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SCIENTIFIC JOURNALS & PROCEEDINGS
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Diffraction-Limited Flat Reflective Microlenses by
Plasmonic Photopatterning of Molecular Orientations |
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HAO YU, MIAO
JIANG, HAI YUN, YOUYANG ZHU, YONGLE QI, ZIYUAN ZHOU, IRAKLI
CHAGANAVA, AND QI-HUO WEI
Journal of the Optical Society of America B
Optica Publishing Group (ISSN:1520-8540), Vol. 40, Issue 11, pp.
2796-2800 (9 October 2023); doi: 10.1364/JOSAB.503277
Abstract:
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Abstract:
In this study, we demonstrate that flat reflective
microlenses with different 𝑓-numbers and focal
lengths can be designed by manipulating the
Pancharatnam–Berry (PB) phase obtained by light upon
reflection from cholesteric liquid crystals and
fabricated with high quality using a plasmonic
photopatterning technique. We have measured the
point-spread functions of these microlenses and show
that they are diffraction-limited. An advantage of
this approach for fabricating flat micro-optical
devices is that it allows for the simultaneous
design of diffraction-limited quality and low
fabrication cost.
© 2023 Optica Publishing Group
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Application of the polarization-holographic imaging
Stokes spectropolarimeter in astronomy |
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BARBARA
KILOSANIDZE, GEORGE KAKAURIDZE, IRAKLI CHAGANAVA,
TEIMURAZ KVERNADZE, GEORGI KURKHULI, LUIS ORIOL, MILAGROS PIÑOL,
QI-HUO WEI
Astronomical Optics: Design, Manufacture, And Test Of Space And
Ground Systems IV
SPIE Proceedings (ISSN:0277-786X), Vol. 12677, 0U (4 October 2023); doi:
10.1117/12.2677357
Editors: Tony B. Hull, Daewook Kim, Pascal Hallibert
Abstract:
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Abstract:
An innovative polarization-holographic imaging
Stokes spectropolarimeter is presented. The main
analyzing unit of such a polarimeter is the integral
polarization-holographic diffraction element, which
enables the complete analysis of the polarization
state of incoming light to be carried out in
real-time. It decomposes the incoming light into
diffraction orders, the intensities of which vary
depending on the polarization state of the light
source. After the simultaneous diffraction order
intensity measurements of the corresponding points
or areas in the diffraction orders, we get the
real-time Stokes images of the light source, which
allows determining the entire polarization state of
a point or extended space object for different
spectral regions and variable polarization. A
working aperture can be from 0.5 cm up to 5 cm in
diameter. The results of studies on improving the
stability and diffraction efficiency of the element
are presented. Measurements of the polarization
state by the standard star were carried out to
calibrate the spectropolarimeter. Polarimetric
measurements of some astronomical objects have been
carried out. The resulting errors are better than
10-2. The polarization-holographic imaging Stokes
spectropolarimeter has no mechanically moving or
electrically tunable optical elements, has no
internal reflections, and is universal, compact,
cost-effective, and lightweight.
© (2023)
COPYRIGHT Society of Photo-Optical Instrumentation
Engineers (SPIE).
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Improving the photoresponse of organic
polarization-sensitive media by dimerizing the
chromophoric component |
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IRAKLI
CHAGANAVA, BARBARA KILOSANIDZE, GEORGE KAKAURIDZE, IRINE
KOBULASHVILI, AMIT BHOWMICK AND PHILIP BOS
Organic Photonic Materials and Devices XXIV
SPIE Proceedings (ISSN:0277-786X), Vol. 11998, 0D (7 March 2022); doi:
10.1117/12.2610109
Editors: William M. Shensky III; Ileana Rau; Okihiro Sugihara
Abstract:
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Abstract:
Polarization-sensitive media based on polymers and
functional chromophores have deservedly occupied
their niche among photonic materials that are
increasingly contributing to the possibilities of
richer light sensing, in the field of optical
communications, information transfer, its storage,
display, etc. within a wide range of applications.
The media considered here are represented by
multiple highly polar compositions based on
functional azo dyes doped in a compatible biopolymer
as a matrix. This paper presents our specific
studies on the influence of molecular-structural
factors on the photoanisotropic properties of
polarization-sensitive compositions. The
illustrative examples show evidence of the finding
of one of the factors that work out the light
sensitivity of the materials for multiple times.
This factor was the molecular aggregation of the
chromophoric component. Quite accurate comparisons
are shown of the improvement in photoresponsibility
of various compositions with the mutual combination
of their chromophoric molecules, in particular as a
result of their component dimerization. In the
overwhelming majority of azochromophoric dimers
demonstrate greater sensitivity to actinic polarized
light rather than their predecessor versions. The
paper also demonstrates an example of going beyond
the framework of dimerization towards the further
development of the aggregation of molecules with the
formation of azopolymers. The latter turned out to
be promising in the case of the correct
implementation of increasing integration of the
components of the studied materials.
© (2022) COPYRIGHT Society of Photo-Optical
Instrumentation Engineers (SPIE).
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Light-controlled spectral selectivity in
polarization-sensitive materials |
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IRAKLI CHAGANAVA, GEORGE KAKAURIDZE, BARBARA KILOSANIDZE,
AND IRINE KOBULASHVILI
Organic Photonic Materials and Devices XXIII
SPIE Proceedings (ISSN:0277-786X), Vol. 11683, 11 (5 March 2021); doi:
10.1117/12.2583007
Editors: William M. Shensky III; Ileana Rau; Okihiro Sugihara
Abstract:
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Abstract:
The
phenomenon of vector polyphotochromism was found
earlier in some high-efficient
polarization-sensitive materials depending on the
radiant exposure of the inducing linearly polarized
actinic light. This effect was observed at high
radiant exposures. In this paper the vector
polyphotochromic effect is considered when
azimuthally dependent exposure is used. The
principal difference in these two approaches is
that, in exposure-dependent technique, the
transmission spectrum of the material depends on the
magnitude of the inducing light exposure and this
dependence is non-linear. Therefore, certain tunable
spectral profiles of the material are very difficult
to be fixed, in particular, in the blue spectral
region. In the use of the azimuthally dependent
technique, the changes in the transmission spectrum
are occurred depending on the polarization azimuth
of the inducing light. It is shown that the
advantage of this approach is the possibility of
inducing this effect at much lower exposures of the
exciting radiation and obtaining approximately
linear dependence of the spectral characteristics of
the material on illumination conditions. It should
be noted the material used exhibits photochromic
behavior of an unusual nature, which is based not on
a slight change in the spectral characteristics of
the pigment under the light action, but there are
changes in the so-called interference color of the
medium as a result of selective quenching the
corresponding regions of the transmission spectrum
of the given material. The polarizationsensitive
materials based on biopolymer matrix and organic azo
dyes have been used. The obtained results can be
used for creating spectral-selective polarization
element with high-speed.
© (2021) COPYRIGHT Society of Photo-Optical
Instrumentation Engineers (SPIE).
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Control of microswimmers by spiral nematic vortices:
Transition from individual to collective motion and
contraction, expansion, and stable circulation of
bacterial swirls |
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RUNA KOIZUMI, TARAS TURIV, MIKHAIL M. GENKIN, ROBERT J.
LASTOWSKI, HAO YU, IRAKLI CHAGANAVA, QI-HUO WEI, IGOR S.
ARANSON, AND OLEG D. LAVRENTOVICH
Physical Review Research
- American
Physical Society
(ISSN 2643-1564), Volume 2, Issue 3, 033060 (13 July 2020);
https://doi.org/10.1103/PhysRevResearch.2.033060
Abstract:
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Abstract:
Active
systems composed of self-propelled units show
fascinating transitions from Brownian-like dynamics
to collective coherent motion. Swirling of swimming
bacteria is a spectacular example. This study
demonstrates that a nematic liquid crystal
environment patterned as a spiral vortex controls
individual-to-collective transition in bacterial
swirls and defines whether they expand or shrink. In
dilute dispersions, the bacteria swim along open
spiral trajectories, following the preimposed
molecular orientation. The trajectories are nonpolar.
As their concentration exceeds some threshold, the
bacteria condense into unipolar circular swirls
resembling stable limit cycles. This collective
circular motion is controlled by the spiral angle
that defines the splay-to-bend ratio of the
background director. Vortices with dominating splay
shrink the swirls toward the center, while vortices
with dominating bend expand them to the periphery.
Spiraling vortices of 45° with splay-bend parity
produce the most stable swirls. All the dynamic
scenarios are explained by hydrodynamic interactions
of bacteria mediated by the patterned passive
nematic environment and by the coupling between the
concentration and orientation. The acquired
knowledge of how to control individual and
collective motion of microswimmers by a nematic
environment can help in the development of
microscopic mechanical systems.
© (2020) the American Physical Society under the
terms of the Creative Commons Attribution 4.0
International license.
Further distribution of this work must maintain
attribution to the author(s) and the published
article's title, journal citation, and DOI.
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The role of conductivity and molecular mobility on the
photoanisotropic response of a new azo-polymer
containing sulfonic groups |
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SAKINAH MOHD ALAUDDIN, NURUL FADHILAH KAMALUL ARIPIN, TS
VELAYUTHAM, IRAKLI CHAGANAVA, ALFONSO MARTINEZ-FELIPE
Journal of Photochemistry and Photobiology A: Chemistry
- Elsevier
(ISSN:1010-6030), Volume 389, pages 112268 (15 February 2020); doi:
10.1016/j.jphotochem.2019.112268
Abstract:
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Abstract:
We
report the preparation of a new light-responsive
side-chain terpolymer containing azobenzenes, as
chromophoric components, sulfonic groups, as polar
components, and methacrylate groups, as film forming
components, and we provide a detailed
characterisation of its thermal parameters,
photoanisotropic character, dielectric response and
optoelectronic properties. The
poly[(4-methoxyazobenzene-4′-oxy)methacrylate]-co-poly[2-acrylamido-2-methyl-1-propanesulfonic
acid]-co-poly[methylmethacrylate], MeOAzB/AMPS/MMA,
was prepared by radical copolymerisation, possesses
high thermal stability and is amorphous. Its high
glass transition [T(g)=151°C] is explained by steric
effects (induced by the bulky azobenzenes) and
hydrogen bonding (promoted by the polar sulfonic
groups) near the polymeric backbone, which may also
reduce the photoanisotropic efficiency. The
transition between the energy levels of the
azobenzenes (MeOAzB) in the terpolymer is controlled
by p-type conductivity, and can be associated to
motions in the side-chains containing the sulfonic
groups (AMPS), which are locally activated below the
MeOAzB/AMPS/MMA glass transition.
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Liquid crystal Pancharatnam-Berry optical elements |
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ZIYUAN ZHOU, YUBING GUO, HAO YU, MIAO JIANG, TARAS TURIV,
IRAKLI CHAGANAVA, OLEG D. LAVRENTOVICH, QI-HUO WEI
Organic Photonics + Electronics. Liquid Crystals XXIII
SPIE Proceedings (ISSN:0277-786X), Vol. 11092, 0D (29 August 2019); doi:
10.1117/12.2528086
Editor: Iam Choon Khoo
Abstract:
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Abstract:
In this paper, we aim to show that liquid
crystal films (LCs) with well-defined molecular
orientations are an exceptional platform for flat
optical devices based on the Pancharatnam-Berry (PB)
phase. Especially, the development of plasmonic
photopatterning technique in recent years has made
it easy to align liquid crystal molecules in to
designer orientation patterns with both high spatial
resolution and high throughput and thus enables
large scale manufacturing liquid crystal optical
devices with low costs. Here we present liquid
crystal laser beam shapers and microlenses as two
examples to illustrate the design principles and the
fabrication processes for liquid crystal flat
optical elements. In comparison with flat optical
devices made of plasmonic or dielectric metasurfaces,
liquid crystal flat optical elements are
advantageous due to the high optical efficiencies
and low fabrication costs.
© (2019) COPYRIGHT Society of Photo-Optical
Instrumentation Engineers (SPIE).
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| The resemblance of polarization
spectra of polymers between photo- and mechanically- induced
microstrains |
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IRAKLI CHAGANAVA, BARBARA KILOSANIDZE, IRINE KOBULASHVILI
Optical Manipulation and Structured Materials/SPIE Structured
Light
SPIE Proceedings (ISSN:0277-786X), Vol. 11141, P-18 (21 April 2019);
doi: 10.1117/12.2535563
Editors: Takashige Omatsu, Hajime Ishihara, Keiji Sasaki
Abstract:
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Abstract:
The study of the mechanism of the phenomenon of
vector polyphotochromism led to the opinion that it
has an interference nature. This paper presents the
first experimental data on the correspondence of
this effect with the manifestation of the
photoelasticity of the polymer component of the
material. We verified the accordance of the
transmission spectra of polarized light on the one
hand of a photoactivated polarization-sensitive
material and on the other hand under the influence
of a mechanical stress. The profiles of the obtained
polarization spectra match each other.
© (2019) COPYRIGHT
Optics & Photonics International Congress, Japan (OPIC)
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Controlled placement of microparticles at the
water-liquid crystal elastomer interface |
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GRETA BABAKHANOVA, HAO
YU, IRAKLI CHAGANAVA, QIHUO WEI, PAUL SHILLER, OLEG D
LAVRENTOVICH
ACS Applied Materials & Interfaces
American Chemical Society (United States. E-ISSN:1944-8252), 11,
16 (26 March 2019); doi: 10.1021/acsami.8b22023
Abstract:
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Abstract:
Controlled placement of microparticles is of
prime importance in production of microscale
superstructures. In this work we demonstrate the
remote control of microparticle placement using a
photo-activated surface profile of a liquid crystal
elastomer (LCE) coating. We employ light-responsive
LCEs with pre-imposed patterns of molecular
orientation (director) in the plane of coating. Upon
UV illumination, these in-plane director distortions
translate into deterministic topographic change of
the LCE coating. Microparticles placed at the
interface between the LCE coating and water, guided
by gravity, gather at the bottom of photoinduced
troughs. The effect is reversible: when the
substrates are irradiated with a visible light, the
coatings become flat and the colloidal arrays
disorganize again. The proposed non-contact
manipulation of particles by a photo-activated LCEs
may be useful in development of drug delivery or
tissue engineering applications. © 2019 American
Chemical Society,
United States
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Light-inducing birefringence of organic photoanisotropic
materials integrated via covalent bonds |
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IRAKLI CHAGANAVA, IRINE KOBULASHVILI, SAKINAH MOHD
ALAUDDIN, NURUL FADHILAH KAMALUL ARIPIN, ALFONSO MARTINEZ-FELIPE
Organic Photonic Materials and Devices XXI
SPIE Proceedings (ISSN:0277-786X), Vol. 10915, 17 (27 February
2019); doi: 10.1117/12.2506036
Editors: Christopher E. Tabor; François Kajzar; Toshikuni Kaino
Abstract:
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Abstract:
It is known that polarization holography uses
photoanisotropic materials to record the state of
light polarization. The polarization-holographic
method of storage, transformation, transmission and
processing of information is one of the most
promising directions not only in optical but also in
general among information technologies. The
potential of increasing sensitivity of certain types
of materials to light polarization is not yet fully
mastered. In this paper, azodyecontaining
photoanisotropic polymers are represented as a
result of the study of polarization-sensitive
materials, which are distinguished from their
predecessors by outstanding photosensitivity. The
report shows results of improving the foreground
photoanisotropic characteristics, such as:
increasing the degree of light-inducible
birefringence and the rate of acceleration of this
process. Which is the main measuring criterion of
photosensitivity and effectiveness of the studied
materials. The efficiency of azodye based
polarization-sensitive materials is based on
integration of their components by forces of
electrostatic interactions or covalent bonds. In our
previous works we have repeatedly shown clearly all
the advantages of the results achieved by the
molecular electrostatic integration of the material
components. The presented paper shows different
advantages of photoanisotropic materials consisting
of alternative, covalent bonds, from which the
increased velocity of photoanisotrophy and
significantly improved magnitude of photosensitivity
are worth noting on the first hand. Based on the
experiences accumulated as a result of the conducted
recent research and the developed recommendations,
the new polarization-sensitive materials have
deliberately been synthesized and studied.
© (2019) COPYRIGHT
Society of Photo-Optical Instrumentation Engineers (SPIE),
United States of America
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Liquid Crystal Pancharatnam–Berry Micro-Optical Elements
for Laser Beam Shaping |
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Miao Jiang, Hao Yu,
Xiayu Feng, Yubing Guo, Irakli Chaganava, Taras Turiv,
Oleg D. Lavrentovich, Qi‐Huo Wei
Advanced Optical Materials
Wiley-Blackwell (E-ISSN:2195-1071), Vol. 6, Issue 19 (4 October
2018); doi: 10.1002/adom.201800961
Abstract:
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Abstract:
Shaping the intensity profile of a laser beam is
desired by various industrial applications. In this
paper, a new approach is presented to design and
fabricate liquid crystal (LC) micro-optical elements
(MOEs) with engineered Pancharatnam–Berry (PB)
phases for beam shaping. By generalizing the Snell's
law for spatially variant PB phases, molecular
orientation patterns are designed for the liquid
crystal MOEs to shape a Gaussian laser beam into
flattop intensity profiles with circular and square
cross-sections, with the β parameter varied from 4
to 42. It is demonstrated that such liquid crystal
beam shaping MOEs can be fabricated with high
throughput and high resolution by using a
photopatterning technique based on plasmonic
metamasks and that they produce excellent beam
quality, no zero-order light leakage with a beam
size from 10 to 600 µm. As the plasmonic metamasks
allow for encoding arbitrary molecular orientations,
i.e., arbitrary geometric phase profiles, the
approaches presented here are widely applicable to
large-scale manufacturing of liquid crystal MOEs for
any beam shapes. © 2018 WILEY-VCH Verlag GmbH & Co.
KGaA, Weinheim
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Study of the photoanisotropic properties of
polarization-sensitive compositions based on organic
chromophore salts with various alkali metals |
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IRAKLI CHAGANAVA, ROIN CHEDIA, QI-HUO WEI
Optical Manufacturing and Testing XII
SPIE Proceedings (ISSN:0277-786X), Vol. 10742, 1K (14 September 2018); doi: 10.1117/12.2324568
Editors: Ray Williamson; Dae Wook Kim; Rolf Rascher
Abstract:
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Abstract:
According to our studies of
polarization-sensitive materials based on
azochromophores and polymers in recent years, a
factor significantly influencing their
photoanisotropic properties has been revealed. The
degree of molecular integration of the material
components (light-absorbing centers and polymer
matrix) is in direct connection with the level of
achievable birefringence in media obtained on their
basis. This paper considers the results of a study
of the integration of polarization-sensitive
materials by means of molecular electrostatic
forces. Experimental data of the photoanisotropic
behavior of optical media based on advisedly
designed organic chromophore salts with the
participation of almost all alkali metals are shown.
Lithium (Li⁺), sodium (Na⁺), potassium (K⁺), cesium
(Cs⁺) and hydrogen (H⁺) are used as cations for
these polarized light-receiver organic salts, and as
an anion, on the other hand, is a residue of
functional monoazo dye. The obtained light-absorbing
organic salts are doped into the hydrophilic polymer
matrix having good lyophilic compatibility. To study
the induction of photoanisotropy in the obtained
photosensitive materials, we investigate the effect
of actinic polarized light on them with wavelengths
of 445 nm and 532 nm and variation of reading
wavelengths (at 532 nm and 635 nm) depending on the
spectral characteristics of the test samples.
Optimum parameters of exposure for each composition
are determined experimentally. The kinetic curves of
the induction of photoanisotropy in the new
comparing polarization-sensitive media are shown as
light-induced effective photoanisotropy for the
various illumination conditions. © (2018) COPYRIGHT
Society of Photo-Optical Instrumentation Engineers (SPIE),
United States of America
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Induction of the Vector Polyphotochromism in Side-chain
Azopolymers |
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IRAKLI CHAGANAVA, BARBARA
KILOSANIDZE, GEORGE KAKAURIDZE, LUIS ORIOL, MILAGROS PIÑOL,
ALFONSO MARTINEZ-FELIPE
Journal of Photochemistry and Photobiology A: Chemistry
- Elsevier
(ISSN:1010-6030), Volume 354, pages 70-77 (1 March 2018); doi:
10.1016/j.jphotochem.2017.09.067
Abstract:
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Abstract:
The phenomenon of vector photochromism was
observed in some high-efficient
polarization-sensitive materials depending on the
radiant exposure of the inducing linearly polarized
actinic light. When radiant exposure exceed certain
value specific to each material, a sharp change in
the transmission spectrum of the probing linearly
polarized nonactinic beam is observed after
analyzer. While probing with unpolarized light the
transmission spectrum is practically unchanged and
does not depend on the magnitude of the radiant
exposure. The mechanism of this phenomenon is
discussed. The effect is an interference nature and
depends on the path difference between the ordinary
and extraordinary rays in material with
photo-induced anisotropy. It is shown that the
kinetics of this effect depends on the
photosensitive layer thickness and the concentration
of the chromophore.The beams with a wavelength away
from the absorption band of the material were used
as a probing. It is shown that in this case
birefringence has made the main contribution in
photoanisotropy. The experiments were carried out
for polarization-sensitive materials with varying
degrees of components integration, in particular,
two synthesized side-chain azopolymers obtained by
immobilization of polar azo dyes on
polymethylmethacrylate backbone. It is shown that
the maximum value of the birefringence Δn = 0.162
achieved in azopolymers with covalently bonded
components. In this case a third order of
interference of the probing beam is observed.
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The study of polyelectrolyte-containing photoanisotropic
compositions |
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IRAKLI CHAGANAVA,
BARBARA KILOSANIDZE, GEORGE KAKAURIDZE, IRINE KOBULASHVILI
Light Manipulating Organic Materials and Devices IV
SPIE Proceedings (ISSN:0277-786X), Vol. 10360, 0L (25 August
2017); doi: 10.1117/12.2274518
Editors: Manfred Eich; Jean-Michel Nunzi; Jon A. Schuller; Joy
E. Haley
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Abstract:
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Abstract:
This paper presents the experiments on
photoanisotropic organic media films based on the
composition of the azodye and polymer containing
different polyelectrolytes. As a part of an
experiment to strengthen the cohesion of the matrix
macromolecules, we individually added to the test
compositions polyelectrolytes with variations of
quantity and with the different nature. The kinetic
curves of the inducing photoanisotropy in the
polarization-sensitive films are shown. The addition
of the electrolyte to this type of materials
contributes to an early manifestation of vector
polyphotochromic effect at low exposures, which in
turn is a sign of improved photoanisotropic
properties as this effect appears exclusively in
high-performance polarization-sensitive materials. ©
(2017) COPYRIGHT Society of Photo-Optical
Instrumentation Engineers (SPIE).
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Photoanisotropy in Polarization-sensitive Polymer
Materials Based on the Media with Covalently-bonded
Components |
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IRAKLI CHAGANAVA, BARBARA KILOSANIDZE, GEORGE KAKAURIDZE, LUIS ORIOL, MILAGROS PIÑOL,
ALFONSO MARTINEZ-FELIPE
Organic Photonic Materials and Devices XIX
SPIE Proceedings (ISSN:0277-786X), Vol. 10101, 0T (2017); doi:10.1117/12.2249997
Editors: Christopher E. Tabor; François Kajzar; Toshikuni Kaino;
Yasuhiro Koike
Abstract:
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Abstract:
The well-known scalar photochromism phenomenon
is a reversible phototransformation of chemical
species between two forms having different
absorption spectra. It is observed under the action
of actinic light regardless of its polarization
state. Unlike this in some high-efficient
polarization-sensitive azopolymeric materials, we
have observed a welldeveloped vector
polyphotochromism which appears as a light-induced
area with spectral selectivity for the linearly
polarized probing beams. A sharp change in the
transmission spectrum of the material have been
observed when we placed an irradiated area of the
sample between crossed polarizers, while the
transmission spectrum of the sample remained
practically unchanged in case of probing by
unpolarized light. The effect has a purely vector
nature, while the transmission spectrum of the
exposed material essentially changes in case of
observing between crossed polarizers and the change
in the spectrum unambiguously depends on the energy
exposure. A significant dependence of the kinetic of
the vector polyphotochromism induction on the power
density of linearly polarized actinic light (445 nm)
is shown for probing beam of 635 nm. It is also
shown that the kinetics of the effect depends on the
photosensitive layer thickness and the concentration
of the chromophore. The experiments were carried out
for two synthesized side-chain azopolymers obtained
as immobilized polar azo dyes on
polymethylmethacrylate backbone. It is clearly shown
a light-controlled spectral selectivity of the
sample activated by the various doses of the
stimulating radiation.
© (2017) COPYRIGHT Society of
Photo-Optical Instrumentation Engineers (SPIE),
United States of America
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Light Manipulating Vector Polyphotochromatic Behavior in
Organic Polarization-sensitive Materials |
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IRAKLI CHAGANAVA, BARBARA KILOSANIDZE, GEORGE KAKAURIDZE
Light Manipulating Organic Materials and Devices II
SPIE Proceedings (ISSN:0277-786X), Vol. 9564, 0L (5 September 2015);
doi:10.1117/12.2188049
Editors: Editor: Jon A. Schuller
Abstract:
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Abstract:
The phenomenon of vector polyphotochromism
within a wide spectral range is revealed in organic
polarization-sensitive materials when material is
illuminated with linearly polarized actinic light.
The effect has a purely vector nature, while the
transmission spectrum of the exposed material
essentially changes in case of observing between
crossed polarizers and the change in the spectrum
unambiguously depends on the energy exposure. A
significant dependence of the kinetic of the vector
polyphotochromism induction on the power density of
linearly polarized actinic light (445 nm) is shown
for probing beam of 635 nm. It is also shown that
the kinetics of the effect depends on the degree of
integration of the component molecules of the
material by the cohesion of both ways the
electrostatic forces (by use mineral electrolytes
and polyelectrolytes) and the covalent bonds (azopolymers
based on different chromophores), as well as on the
photosensitive layer thickness and the concentration
of the chromophore. The mechanism of the phenomenon
is discussed. Considering the fact that the change
in the spectral characteristics occurs throughout
the full visible range, this effect may be used for
creating the spectrally selective dynamic
polarization holographic gratings, displays based on
new physical principles, and also for creating
modulators and dynamic polarization spectral filters
controlled by light.
© 2015 COPYRIGHT Society of
Photo-Optical Instrumentation Engineers (SPIE),
United States of America
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Vector Photochromism in Polarization-sensitive Materials |
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IRAKLI CHAGANAVA, BARBARA
KILOSANIDZE, GEORGE KAKAURIDZE, YURI MSHVENIERADZE.
Optics Letters
Optical
Society of America (ISSN:0146-9592), Vol. 39, Issue 13, pages
3841-3844 (1 July 2014) doi: 10.1364/OL.39.003841
Abstract:
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Abstract:
The phenomenon of vector photochromism was
observed in some high-efficient
polarization-sensitive materials depending on the
radiant exposure of the inducing linearly polarized
actinic light. The phenomenon has the purely vector
nature because the absorption of the irradiated and
unirradiated areas of the material is practically
identical when we use unpolarized probing light.
However, an essential change in the absorption
spectrum was observed under probing the sample by
linearly polarized nonactinic light when it passes
through an analyzer, and this change depends on the
value of radiant exposure. The kinetics of the
photoanisotropy induced by linearly polarized
actinic light at 457 nm was studied in case of
wavelengths of 532 and 635 nm of the probing beam.
The noticeable difference in absorbance was observed
with increase in radiant exposure from 60 J/cm2 up
to 250 J/cm2 for the used wavelengths of the probing
beam. The experimental results obtained in
polarization-sensitive material based on the
ammonium salt of the azodye Mordant pure yellow in a
gelatin matrix are presented. The dependence of the
effective anisotropy on the material thickness has
been investigated. The mechanism of the phenomenon
is discussed. The observed effect can be used for
creating dynamic polarization spectral filters
controlled by light and the spectrally selective
dynamic polarization holographic gratings. © 2014
Optical Society of America.
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Light-Controlled Vector Polyphotochromism |
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IRAKLI CHAGANAVA, BARBARA
KILOSANIDZE, GEORGE KAKAURIDZE and YURI MSHVENIERADZE
Organic
Photonics VI
SPIE
Proceedings (ISSN:0277-786X), Vol. 9137, 12 (1 May 2014);
doi:10.1117/12.2051756
Editors: Barry P. Rand; Chihaya Adachi; David Cheyns; Volker van
Elsbergen
Abstract:
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Abstract:
Phenomenon of vector polyphotochromism was
observed in some high-efficient
polarization-sensitive materials dependent on the
radiant exposure when material was illuminated with
linearly polarized actinic light. The phenomenon has
purely vector nature, since under probing by
unpolarized light, the transmission spectra of the
irradiated and unirradiated area of the material are
practically identical. However, an essential change
in the transmission spectrum of the material was
observed by placing the irradiated area between
crossed polarizers when the orientation of the axis
of induced anisotropy was of 45 degrees relative to
the axes of the polarizers. The dispersion of
photoanisotropy was studied at different exposure
values. Kinetic curves of the photoanisotropy were
obtained for wavelength of 532 nm and 635 nm of
probing beam for different values of exposure (30,
60 and 250 J/cm2) with linearly polarized actinic
light (457 nm). The dispersion curves of the
photoanisotropy were obtained for these values of
exposure showing an anomalous behavior for exposures
above of 30 J/cm2. This phenomenon was observed in
specially synthesized organic materials based on azo
dyes introduced in a polymer matrix. The difference
between optical densities was obtained for polarized
light with a wavelength of 532 nm and 635 nm at
different exposures, which makes the prospect the
dynamic polarization spectral filters controlled by
light and the spectrally selective dynamic
polarization holographic gratings to be created.
© 2014 Society of Photo-Optical Instrumentation
Engineers (SPIE)
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Dynamic Polarization Holography: 2. Dynamic
Polarization-Holographic Gratings and their Application |
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BARBARA KILOSANIDZE, GEORGE KAKAURIDZE, IRAKLI CHAGANAVA
and YURI MSHVENIERADZE
Applied Optics
Vol. 52, Issue 5, pp. 1006-1015. (2013) doi:10.1364/AO.52.001006
Abstract:
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Abstract:
Dynamic polarization-holographic gratings with a
different profile of anisotropy in the band are
presented. Polarization-sensitive recording
materials of two types are used: material possessing
high dark relaxation and highly reversible material
without dark relaxation in which the recorded
grating is erased by a circularly polarized beam.
For a grating recorded by two orthogonally
circularly polarized beams a diffraction efficiency
of 20% has been obtained at 3.5 W/cm2 power density
during 1 ms recording/erasing time. An all-optical
cross commutator based on the matrix of dynamic
reprogrammable polarization-holographic
microholograms is considered. The amplification of
the weak beam at two-wave mixing in
polarization-sensitive materials has been shown,
with an obtained amplification coefficient of 4.95.
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Development of High-performance, Stable and
Moisture-resistant Polarization-sensitive Materials |
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IRAKLI CHAGANAVA, GEORGE KAKAURIDZE, BARBARA KILOSANIDZE and
GEORGE DATUKISHVILI
Optical Manufacturing
and Testing IX
SPIE Proceedings, Vol. 8126, 1I (27 September 2011); doi:10.1117/12.894710
Editors: James H. Burge; Oliver W. Fähnle; Ray Williamson
Abstract:
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Abstract:
New stable polarization-sensitive materials are
developed on the hydrophobic components basis which
doesn't require an additional moisture protection.
Bisazodye ortho-tolidinebisazophenol chromophoric
component was synthesized which is liposoluble
analogue of water-soluble azodye Mordant Pure Yellow
M. This bisazodye were used to develop the
hydrophobic materials films which can be applied as
a protective layer themselves. To increase the
thermal stability we have synthesized material by
introducing bisazodye into the main-chain of
macromolecule of thermally stable polymer. The
different types of polarization-holographic gratings
with high diffraction efficiency of 30-50% were
recorded on the obtained materials by laser beams
(441 - 488 nm).
© (2011) COPYRIGHT Society of Photo-Optical
Instrumentation Engineers (SPIE). Downloading of the
abstract is permitted for personal use only.
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Photoanisotropy in Polarization-sensitive Medium
Developed on the Basis of Polar Water-soluble Components |
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IRAKLI CHAGANAVA, GEORGE KAKAURIDZE, BARBARA KILOSANIDZE
Practical Holography XXV: Materials and Applications
SPIE Proceedings, Vol. 7957, 14 (7 February 2011);
doi:10.1117/12.874744
Editor: Hans I. Bjelkhagen
Abstract:
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Abstract:
In order to obtain a polarization sensitive
materials with improved characteristics, there was
conducted intensify interaction between the
components of recording media through the
interaction between the molecular electrostatic
forces. For creating materials there were used
various organic dyes capable of photochemical
geometric isomerization under the influence of
actinic polarized light with a wavelength closed to
the maximum of the absorption spectrum of each dye.
Various polarization sensitive materials have been
synthesized based on the polar water-soluble
components. Substantial improvement photoanisotropic
characteristics of these materials are revealed due
to previously added ionizing functional groups in
the chromophoric components. It is shown particular
exemplary embodiment of synthesis the materials
composed of dyes which communicate with certain
polymers via dipole-ionic bonds. The research data
of medium properties on their base have been brought
up for the consideration. In the same way
photoanisotropic materials are created on basis of
various polar polymer matrixes which separate
macromolecules are capable of establishing
dipole-dipole bonds with each other. Thanks to this
circumstance a supplementary number of polymer
fragments which cannot afford direct connection with
dye molecules are also able to get drawing into the
photoanisotropy inducting processes. It is displayed
the influence of such interactions on material
kinetics and value of attainable photoanisotropy. A
capability of achievement extremely high values of
photoanisotropy is produced on the material samples
based on the dyes with expanded number of ionized
substituent.
© (2011) COPYRIGHT Society of Photo-Optical
Instrumentation Engineers (SPIE). Downloading of the
abstract is permitted for personal use only
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Dynamic Polarization Holography: Methods and
Applications |
-
B.
KILOSANIDZE, G. KAKAURIDZE and I. CHAGANAVA
Journal of Holography
and Speckle
Volume 5, Number 1, April 2009 , pp. 52-61(10) DOI:
10.1166/jhs.2009.008
Abstract:
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Abstract:
The
results of investigations of kinetics of
photoanisotropy induction and relaxation in
polarization-sensitive media with
conformation-orientation mechanism of the anisotropy
induction and having significant dark relaxation are
presented. It is shown that such materials can be
applied for tasks of dynamic polarization
holography. With the purpose of improvement dynamic
characteristics of polarization-sensitive materials
azodye Nitrodimethyl red (NDMR) is specially
synthesized. Materials on the basis of NDMR are used
for recording dynamic polarization-holographic
gratings with different profile of anisotropy. The
results of the investigation of kinetics of
diffraction efficiency (DE) of these gratings and
the analysis of polarization state of diffracted
orders are given. It is shown that the time of a
cycle of recording/erasing for gratings of some
types is of the order of 100 ms at DE = 21%. The
theoretical model of dynamic
polarization-holographic recording on such materials
is presented. Possible applications of the methods
of dynamic polarization holography are discussed.
© 2009 American Scientific Publishers.
ISSN:1546-900XE-ISSN:1546-9018
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Dynamic Polarization Holography: Methods and
Applications |
- B. KILOSANIDZE, G. KAKAURIDZE and I. CHAGANAVA
Holography: Advances and Modern Trends
SPIE Proceedings 7358, 0S (2009); doi:10.1117/12.821766
Editors: Miroslav Miler; Miroslav Hrabovský
Abstract:
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Abstract:
The results of investigations of kinetics of
photoanisotropy induction and relaxation in
polarization-sensitive media with
conformation-orientation mechanism of the anisotropy
induction having significant dark relaxation are
presented. It is shown that such materials can be
applied for tasks of dynamic polarization
holography. With the purpose of improvement dynamic
characteristics of polarization-sensitive materials
azodye Nitrodimethyl red is specially synthesized.
Materials on the basis of NDMR are used for
recording dynamic polarization-holographic gratings
with different profile of anisotropy. The results of
the investigation of kinetics of diffraction
efficiency (DE) of these gratings and the analysis
of polarization state of diffracted orders are
given. It is shown that time of a cycle of
recording/erasing for gratings of some types is of
the order of 100 ms at DE = 21 %. The theoretical
model of dynamic polarizationholographic recording
on such materials is presented. Possible
applications of the methods of dynamic polarization
holography are discussed. © (2009) COPYRIGHT Society
of Photo-Optical Instrumentation Engineers (SPIE).
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Dynamic Polarization Holography. 1. Dynamic
Polarization-sensitive Materials on the Basis of Azo-dye-containing
Polymers |
- B.
KILOSANIDZE, G. KAKAURIDZE and I. CHAGANAVA
Applied Optics
Vol. 48, Issue 10, pp. 1861-1868 (2009) doi:
10.1364/AO.48.001861
Abstract:
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Abstract:
The theoretical and experimental investigation
of the kinetics of photoanisotropy induction in
polarization-sensitive media with significant dark
relaxation on the basis of azo dyes in polymer
matrices is considered. For improving dynamic
characteristics of polarization-sensitive materials,
new azo dye
N,N-dimethyl-4((4-nitrophenyl)diazenyl)aniline has
been specially synthesized, and the kinetics of
photoanisotropy induction and relaxation in
materials on the basis of this dye has been compared
with materials on the basis of Dimethyl Yellow. It
is shown that spectral sensitivity of the material
with new azo dye is in the range of 470–520 nm, the
working range is both in the visible and in the
infrared range (from 520 nm at least up to 3400 nm),
the maximum meaning of effective anisotropy is 38% (Δn≈0.022),
and the time of photoanisotropy inducing and erasing
is approximately 18 ms. It is shown that, if we
confine ourselves to meanings of effective
anisotropy of approximately 1–2% (Δn≈0.007), the
time of inducing/erasing will be of the order of
microseconds. The use of such dynamic
polarization-sensitive materials gives the
possibility of a new direction—dynamic polarization
holography to be developed that com bines the
possibilities of both dynamic and polarization
holography and that opens new prospects for
applications.
© 2009 Optical Society of America
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The Influence of Chemical Activities Polymer Matrices on
Photo Anisotropy of Azo dyes |
-
VALENTINA SHAVERDOVA, SVETLANA PETROVA, NINO OBOLASHVILI,
IRAKLI CHAGANAVA
Optical Design and
Engineering III
SPIE Proceedings 7100, 1P (2008); doi:10.1117/12.798380
Editors: Laurent Mazuray; Rolf Wartmann; Andrew Wood; Jean-Luc
Tissot; Jeffrey M. Raynor
Abstract:
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|
Abstract:
In this article the results of experimental
investigations of photo anisotropy in organic dyes
embedded in different polymer matrices are reported.
All the matrices used in this work can be subdivided
into those entering into a chemical reaction with
dye molecules and those that are chemically
inactive. The results of this investigation are
suggested that the matrix is of crucial importance
of the creation of photo anisotropic materials.
© (2008) COPYRIGHT Society of Photo-Optical
Instrumentation Engineers (SPIE). Downloading of the
abstract is permitted for personal use only.
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Photoinduced Anisotropy in Seleno-cadmium Glass |
- V.
TARASASHVILI, A. PURTSELADZE, I. CHAGANAVA
Optical Design and
Engineering III
SPIE Proceedings SPIE 7100, 22 (2008); doi:10.1117/12.797620
Editors: Laurent Mazuray; Rolf Wartmann; Andrew Wood; Jean-Luc
Tissot; Jeffrey M. Raynor
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Abstract:
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Abstract:
Anisotropic change of the absorbtion edge of
seleno-cadmium glass under the action of linearly
polarized monoimpulse of a ruby laser of great power
has been investigated. The spectral width of the
area of anisotropic bleaching of the sample which is
being radiated has been estimated. The dispersion
curves of photoinduced birefringence and the
anisotropy of the absorbtion on the absorbtion edge
of the glass of RY-19 type have been obtained in the
interval (6500-6700 Å).
© (2008) COPYRIGHT Society of Photo-Optical
Instrumentation Engineers (SPIE). Downloading of the
abstract is permitted for personal use only.
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Dynamic Polarization-sensitive Media |
-
B.
KILOSANIDZE, G. KAKAURIDZE and I. CHAGANAVA
Optical Memory & Neural
Networks
Volume 16, Number 1, 17-23 (2007) DOI: 10.3103/S1060992X0701002X
Abstract:
 |
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Abstract:
The results of investigations of kinetics of
photoanisotropy induction and relaxation in
polarization-sensitive media with dark relaxation
are presented. The model consideration of
photoanisotropy in polarization-sensitive media with
dark relaxation is presented. The
conformation-orientation mechanism of the anisotropy
induction in these media is considered. The value of
“effective anisotropy” is used for the anisotropy
description that allows measurements of
photoanisotropy to be made in real-time. The time
dependence of the value of photoanisotropy and dark
relaxation on the acting radiation intensity and
relaxation coefficient is shown. The experimental
investigations are carried out on materials on the
basis of azodye Dimethyl Yellow introduced into
different polymer matrices.
© 2007 Springer Nature
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CONFERENCE THESES
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Full Color Recording of Linearly
Polarized Light
Irakli
Chaganava,
Barbara
Kilosanidze, George Kakauridze
Frontiers in Optics / Laser Science 2021
OPTICA Publishing Group > Conferences > FiO > 2021 > JTh5A >
JTh5A.133
expand.
-
Citation:
Irakli Chaganava, Barbara Kilosanidze,
George Kakauridze
"Full Color Recording of Linearly Polarized Light".
Frontiers in Optics / Laser Science 2021
Conference Paper page JTh5A.133
Uniform
Resource Locator:
-
https://doi.org/10.1364/FIO.2021.JTh5A.133
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Control of bacterial dynamics by
splay and bend in nematic vortices
Runa Koizumi, Taras Turiv, Mikhail Genkin, Robert Lastowski, Hao
Yu, Irakli Chaganava, Qihuo Wei, Igor Aronson, Oleg Lavrentovich
Active
Matter and Liquid Crystals in Biological Systems I, APS March Meeting 2020 (American
Physical Society)
American Physical Society > Bulletin of the American Physical
Society > Active Matter and Liquid Crystals in Biological
Systems I > 2020 > P29.00003
expand.
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Dynamic characteristics of
photoanisotropic materials based on biogenic and synthetic
polyelectrolytes
Irakli Chaganava and Irine Kobulashvili
Frontiers in Optics / Laser Science, Frontiers in Optics 2019
OSA Publishing > Conference Papers > LS > 2019 > JTu4A
expand.
-
Citation:
Irakli Chaganava and Irine
Kobulashvili
"Dynamic characteristics of photoanisotropic materials based
on biogenic and synthetic polyelectrolytes".
Frontiers in Optics / Laser Science, Frontiers in Optics
2019
Conference Paper page JTu4A.27
Uniform
Resource Locator:
-
https://www.osapublishing.org/abstract.cfm?URI=LS-2019-JTu4A.27
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Alignment and controlled formation
of topological defects in living fibroblast cells by liquid
crystals
Taras Turiv, Jess Krieger, Hao Yu, Irakli Chaganava,
Qi-Huo Wei, Min-Ho Kim, O D Lavrentovich
Active Matter III, APS March Meeting 2019 (American Physical
Society)
American Physical Society > Bulletin of the American Physical
Society > Active Matter III > 2019 > Volume 64 > Number
2 > F61.00002
expand.
-
Citation:
Taras Turiv, Jess Krieger, Hao Yu, Irakli Chaganava, Qi-Huo
Wei, Min-Ho Kim, O D Lavrentovich
“Alignment and controlled formation of topological defects
in living fibroblast cells by liquid crystals".
APS March Meeting 2019 (American Physical Society)
Vol. 64, N2, F61.00002. Bulletin of the American Physical
Society.
Uniform
Resource Locator:
-
http://meetings.aps.org/Meeting/MAR19/Session/F61.2
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Dynamically morphing microchannels
in liquid crystal elastomer coatings with extended disclinations
Robin Selinger, Greta Babakhanova, Youssef Mosaddeghian
Golestani, Sajedeh Afghah, Michael Varga, Paul Shiller, Hao Yu,
Irakli Chaganava, Jonathan Selinger, Qi-Huo Wei, O
Lavrentovich
Actuation in Soft Matter II, APS March Meeting 2019 (American
Physical Society)
American Physical Society > Bulletin of the American Physical
Society > Actuation in Soft Matter II > 2019 > Volume
64 > Number 2 > S59.00009
expand.
-
Citation:
Robin Selinger, Greta Babakhanova, Youssef Mosaddeghian
Golestani, Sajedeh Afghah, Michael Varga, Paul Shiller, Hao
Yu, Irakli Chaganava, Jonathan Selinger, Qi-Huo Wei, O
Lavrentovich
“Dynamically morphing microchannels in liquid crystal
elastomer coatings with extended disclinations".
APS March Meeting 2019 (American Physical Society)
Vol. 64, N2, S59.00009. Bulletin of the American Physical
Society.
Uniform
Resource Locator:
-
https://meetings.aps.org/Meeting/MAR19/Session/S59.9
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Comparative Characteristics of the
Properties of Photoanisotropic Materials Composed with Covalent
Bond and Electrostatic Interactions
Irakli Chaganava, Sakinah Mohd Alauddin, Nurul Fadhilah
Kamalul Aripin, Alfonso Martinez-Felipe, Irine Kobulashvili
Frontiers in Optics / Laser Science, Frontiers in Optics 2018
OSA Publishing > Conference Papers > LS > 2018 > JTu3A > Page
JTu3A.21
expand.
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Citation:
Irakli Chaganava, Sakinah Mohd
Alauddin, Nurul Fadhilah Kamalul Aripin, Alfonso
Martinez-Felipe, Irine Kobulashvili
“Comparative Characteristics of the Properties of
Photoanisotropic Materials Composed with Covalent Bond and
Electrostatic Interactions".
Frontiers in Optics / Laser Science, Frontiers in Optics
2018
Conference Paper page
JTu3A.21
Uniform
Resource Locator:
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https://www.osapublishing.org/abstract.cfm?uri=LS-2018-JTu3A.21
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The Phenomenon of Vector
Polyphotochromism in Polarization-sensitive Materials
Barbara N. Kilosanidze, Irakli Chaganava, George
Kakauridze, Luis Oriol, Milagros Piñol and Alfonso
Martinez-Felipe
Frontiers in Optics: The 100th OSA Annual Meeting and
Exhibit/Laser Science XXXII. Polarization Control and
Measurements.
OSA Publishing > Conference Papers > FiO > 2016 > FF3G > Page
FF3G.7
expand.
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Citation:
Barbara N. Kilosanidze, Irakli Chaganava, George Kakauridze,
Luis Oriol, Milagros Piñol and Alfonso Martinez-Felipe
"The
Phenomenon of Vector Polyphotochromism in
Polarization-sensitive Materials"
Celebration of the OSA Centennial. Frontiers in Optics: The
100th OSA Annual Meeting and Exhibit/Laser Science XXXII.
Conference Paper page FF3G.7.
Uniform
Resource Locator:
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https://www.osapublishing.org/abstract.cfm?uri=FiO-2016-FF3G.7
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Induction of the Vector
Polyphotochromism in Side-Chain Azopolymers
Irakli Chaganava, Barbara Kilosanidze, George Kakauridze,
Luis Oriol, Milagros Piñol, Alfonso Martinez-Felipe
The
4th International Symposium, Molecular Photonics 2016, dedicated
to academician A.N. Terenin.
The meeting is a pre-symposium of the 21-st International
Conference on Photochemical Conversion and Storage of Solar
Energy (IPS-21)
Book of Molecular Photonics 2016 Symposium abstracts, p. 34.
expand.
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Citation:
Irakli Chaganava, Barbara Kilosanidze, George Kakauridze,
Luis Oriol, Milagros Piñol, Alfonso Martinez-Felipe
“Induction of the Vector Polyphotochromism in Side-Chain
Azopolymers".
The 4th International Symposium, Molecular Photonics 2016,
Book of Molecular Photonics 2016 Symposium abstracts, p. 34.
Uniform
Resource Locator:
-
http://terenin.spb.ru/images/files/MPh-2016_Abstr.pdf
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http://terenin.org
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Spectral Selectivity of Azochromophore-containing Polymer Films
in Polarized Light
Irakli Chaganava, George Kakauridze, Barbara Kilosanidze
4th
International Caucasian Symposium on Polymers and Advanced
Materials, symposium abstract, p. 23.
expand.
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Citation:
Irakli Chaganava, George Kakauridze,
Barbara Kilosanidze
“Spectral Selectivity of Azochromophore-containing Polymer
Films in Polarized Light". ICSP & AM 4
4th International Caucasian Symposium on Polymers and
Advanced Materials. ICSP & AM 2015 symposium abstract, p.
23.
Uniform
Resource Locator:
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http://www.icsp4.tsu.ge/data/file_db/icsp/ICSP.pdf
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Azodye-Containing Polarization-Sensitive Materials
I. Chaganava, G. Kakauridze, B. Kilosanidze
Second
International Conference of Young Scientists. Chemistry Today -
2012. ICYS-2012. Abstract book p.20
expand.
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Photoanisotropic properties enhancement via introducing
ionogenic functional groups into the material azodye component
molecules
Irakli Chaganava, George Kakauridze, Barbara Kilosanidze
2-nd
International Conference on Organic Chemistry: "Advances in
Heterocyclic Chemistry", GeoHet 2011, Book of Abstracts, PP131,
p. 287
expand.
-
Citation:
Irakli Chaganava, George Kakauridze,
Barbara Kilosanidze
"Photoanisotropic properties enhancement via introducing
ionogenic functional groups into the material azodye
component molecules", 2-nd International Conference on
Organic Chemistry: "Advances in Heterocyclic Chemistry",
GeoHet 2011, Book of Abstracts, PP131, p. 287
Uniform
Resource Locator:
-
http://chemistry.ge/conferences/geohet-2011/downloads/GeoHet-2011withCoverpage.pdf
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Polarization-holographic amplifier-corrector of optical signals
V.
Tarasashvili, A. Purtseladze, I. Chaganava
OSA Technical Digest
Series
Coherent Optical Technologies and Applications 2008 Conference
expand.
-
Citation:
V.Tarasashvili, A. Purtseladze, I.
Chaganava,
“Polarization-holographic amplifier-corrector of optical
signals”,
in Coherent Optical Technologies and Applications 2008
Conference, OSA Technical Digest Series (Optical Society of
America, 2008), paper JMB2.
Uniform
Resource Locator:
-
http://www.opticsinfobase.org/abstract.cfm?URI=COTA-2008-JMB2
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Polarization-holographic gratings and devices on their basis:
Polarization-holographic protection system and
Polarization-holographic saccharimeter
Kilosanidze B., Kakauridze G., Mshvenieradze Yu., Chaganava
I.
Technical
Programme p.14, Photonics Europe 2008, Conference Exhibition,
Photonics Innovation Village.
expand.
-
Citation:
Kilosanidze B., Kakauridze G., Mshvenieradze Yu., Chaganava
I.
“Polarization-holographic gratings and devices on their
basis". Laboratory of Holographic Recording & Processing of
Information, Institute of Cybernetics, Georgia.
Photonics
Europe 2008, Photonics Innovation Village, Exhibition Guide p. 8
(Technical Programme p. 14)
Uniform
Resource Locator:
-
http://spie.org/Documents/ConferencesExhibitions/EPE08-Ex-Guide.pdf
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აზოსაღებარების ფოტოქიმიური ქცევები
სხვადასხვა პოლიმერულ მატრიცებში
ვ. შავერდოვა, ს. პეტროვა, ნ. ობოლაშვილი,
ი. ჩაგანავა
კონფერენცია
"ინფორმაციის ჰოლოგრაფიული და ოპტიკური ჩაწერა, შენახვა და
დამუშავება, HOLOOPTO-2008, თეზისების კრებული". გვ. 21-24 (2008)
expand.
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Citation:
ვ.
შავერდოვა, ს. პეტროვა, ნ. ობოლაშვილი, ი. ჩაგანავა
"აზოსაღებარების ფოტოქიმიური ქცევები სხვადასხვა პოლიმერულ
მატრიცებში" - კონფერენცია "ინფორმაციის ჰოლოგრაფიული და
ოპტიკური ჩაწერა, შენახვა და დამუშავება, HOLOOPTO-2008,
თეზისების კრებული". გვ. 21-24 (2008)
Uniform
Resource Locator:
-
http://old.rustaveli.org.ge/upload/topic/1288782468.pdf
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დინამიური
პოლარიზაციულ-ჰოლოგრაფიული" დიფრაქციული მესრები
ბ.
კილოსანიძე, გ. კაკაურიძე,
ი. ჩაგანავა
კონფერენცია
"ინფორმაციის ჰოლოგრაფიული და ოპტიკური ჩაწერა, შენახვა და
დამუშავება, HOLOOPTO-2008, თეზისების კრებული". გვ. 10-11 (2008)
expand.
-
Citation:
ვ.
შავერდოვა, ს. პეტროვა, ნ. ობოლაშვილი, ი. ჩაგანავა
"აზოსაღებარების ფოტოქიმიური ქცევები სხვადასხვა პოლიმერულ
მატრიცებში" - კონფერენცია "ინფორმაციის ჰოლოგრაფიული და
ოპტიკური ჩაწერა, შენახვა და დამუშავება, HOLOOPTO-2008,
თეზისების კრებული". გვ. 10-11 (2008)
Uniform
Resource Locator:
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http://old.rustaveli.org.ge/upload/topic/1288782468.pdf
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ელიფსომეტრული გაზომვები
საღებარი-პოლიმერის ასიმეტრიულ სისტემებში
ვ. შავერდოვა, ს. პეტროვა, ნ. ობოლაშვილი,
ი. ჩაგანავა
კონფერენცია
"ინფორმაციის ჰოლოგრაფიული და ოპტიკური ჩაწერა, შენახვა და
დამუშავება, HOLOOPTO-2008, თეზისების კრებული". გვ. 24-25 (2008)
expand.
-
Citation:
ვ.
შავერდოვა, ს. პეტროვა, ნ. ობოლაშვილი, ი. ჩაგანავა
"აზოსაღებარების ფოტოქიმიური ქცევები სხვადასხვა პოლიმერულ
მატრიცებში" - კონფერენცია "ინფორმაციის ჰოლოგრაფიული და
ოპტიკური ჩაწერა, შენახვა და დამუშავება, HOLOOPTO-2008,
თეზისების კრებული". გვ. 24-25 (2008)
Uniform
Resource Locator:
-
http://old.rustaveli.org.ge/upload/topic/1288782468.pdf
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ფოტოინდუცირებული ანიზოტროპია
სელენ-კადმიუმიან მინაში და მისი პრაქტიკული გამოყენება
ვ. ტარასაშვილი, ა. ფურცელაძე,
ი. ჩაგანავა,
კონფერენცია
"ინფორმაციის ჰოლოგრაფიული და ოპტიკური ჩაწერა, შენახვა და
დამუშავება, HOLOOPTO-2008, თეზისების კრებული". გვ. 39-40 (2008)
expand.
-
Citation:
ვ.
შავერდოვა, ს. პეტროვა, ნ. ობოლაშვილი, ი. ჩაგანავა
"აზოსაღებარების ფოტოქიმიური ქცევები სხვადასხვა პოლიმერულ
მატრიცებში" - კონფერენცია "ინფორმაციის ჰოლოგრაფიული და
ოპტიკური ჩაწერა, შენახვა და დამუშავება, HOLOOPTO-2008,
თეზისების კრებული". გვ. 39-40 (2008)
Uniform
Resource Locator:
-
http://old.rustaveli.org.ge/upload/topic/1288782468.pdf
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