scholarly journals Organic Systems and Their Photorefractive Properties under the Nano- and Biostructuration: Scientific View and Sustainable Development

2015 ◽  
Vol 2015 ◽  
pp. 1-5 ◽  
Author(s):  
Natalia V. Kamanina ◽  
Sergey V. Serov ◽  
Yann Bretonniere ◽  
Chantal Andraud
Keyword(s):  
Sustainable Development ◽  
Refractive Index ◽  
Photorefractive Effect ◽  
Polarization Plane ◽  
Holographic Recording ◽  
Conjugated Materials ◽  
Recording Technique ◽  
Organic Systems ◽  
Self Assembling ◽  
Area Of Application

Essential improvement of the photorefractive parameters of theorganicstructures has been found via nano- and biostructuring process. The spectral and self-assembling features which can support the photorefractive effect of some conjugated materials, including the liquid crystal ones, have been presented. To investigate the laser-induced change of the refractive index of the nano- and bio-objects-doped materials the holographic recording technique has been used. Moreover some innovative perspective dyes have been applied to study the effect of the rotation of the polarization plane of light. The area of application of the modified materials has been discussed. The tendency to replace the nanotechnology process with the biotechnology ones has been predicted.

Specific features of holographic recording of diffraction gratings in thin films of fullerene-containing organic systems

2000 ◽  
Vol 89 (5) ◽  
pp. 651-653 ◽  
Author(s):  
N. V. Kamanina ◽  
L. N. Kaporskii ◽  
V. N. Sizov ◽  
D. I. Stasel’ko
Keyword(s):  
Thin Films ◽  
Diffraction Gratings ◽  
Holographic Recording ◽  
Organic Systems

scholarly journals Functional Smart Dispersed Liquid Crystals for Nano- and Biophotonic Applications: Nanoparticles-Assisted Optical Bioimaging

2016 ◽  
Vol 2016 ◽  
pp. 1-9 ◽  
Author(s):  
N. V. Kamanina ◽  
S. V. Likhomanova ◽  
Yu. A. Zubtcova ◽  
A. A. Kamanin ◽  
A. Pawlicka
Keyword(s):  
Carbon Nanotubes ◽  
Liquid Crystal ◽  
Liquid Crystals ◽  
Solid Substrate ◽  
Holographic Recording ◽  
Self Assembling ◽  
Aligned Carbon Nanotubes ◽  
Vertically Aligned ◽  
Crystal Cells ◽  
Modified Functional

Functional nematic liquid crystal structures doped with nano- and bioobjects have been investigated. The self-assembling features and the photorefractive parameters of the structured liquid crystals have been comparatively studied via microscopy and laser techniques. Fullerene, quantum dots, carbon nanotubes, DNA, and erythrocytes have been considered as the effective nano- and biosensitizers of the LC mesophase. The holographic recording technique based on four-wave mixing of the laser beams has been used to investigate the laser-induced change of the refractive index in the nano- and bioobjects-doped liquid crystal cells. The special accent has been given to novel nanostructured relief with vertically aligned carbon nanotubes at the interface: solid substrate-liquid crystal mesophase. It has been shown that this nanostructured relief influences the orienting ability of the liquid crystal molecules with good advantage. As a result, it provokes the orientation of the DNA. The modified functional liquid crystal materials have been proposed as the perspective systems for both the photonics and biology as well as the medical applications.

Holographic recording by excitation of metastable electronic states in Na 2 [Fe(CN) 5 NO]·2H 2 O: a new photorefractive effect

1999 ◽  
Vol 68 (5) ◽  
pp. 877-885 ◽  
Author(s):  
M. Imlau ◽  
S. Haussühl ◽  
T. Woike ◽  
R. Schieder ◽  
V. Angelov ◽  
...  
Keyword(s):  
Photorefractive Effect ◽  
Electronic States ◽  
Holographic Recording

scholarly journals Some examples of photorefractive oscillators

2016 ◽  
Vol 19 (2) ◽  
pp. 105
Author(s):  
Zoran Ljuboje
Keyword(s):  
Refractive Index ◽  
Phase Conjugation ◽  
Photorefractive Effect ◽  
Ring Oscillator ◽  
Optical Phase Conjugation ◽  
Coherent Light ◽  
Interesting Phenomenon ◽  
Basic Characteristics ◽  
Oscillation Threshold ◽  
Periodical Change

The photorefractive effect presents a periodical change of the refractive index of an optical environment under the influence of a coherent light. An interesting phenomenon which occurs at this effect is optical phase conjugation (PC). Photorefractive oscillators, that is photorefractive mirrors present important decides in photorefractive optics and their function is based on photorefractive effect. In these oscillators, a phase-conjugated light beam occurs. The basic characteristics of photorefractive oscillators, such as reflectivity, the existance of the oscillation threshold and the threshold of the coupling strength are explained by the so-called grating-action method. This is analysed on a ring oscillator, semilinear mirror and linear mirror.

scholarly journals Functional Photonic Elements Based on Liquid Crystal Metasurfaces

2021 ◽  
Vol 2015 (1) ◽  
pp. 012050
Author(s):  
Maxim V. Gorkunov ◽  
Irina V. Kasyanova ◽  
Vladimir V. Artemov ◽  
Artur R. Geivandov ◽  
Ivan V. Simdyankin ◽  
...  
Keyword(s):  
Refractive Index ◽  
Liquid Crystal ◽  
Soft Matter ◽  
Focused Ion Beam ◽  
Ion Beam ◽  
Beam Splitting ◽  
Beam Path ◽  
Self Assembling ◽  
Alignment Layers ◽  
Polymer Alignment

Abstract We study versatile soft-matter metasurfaces based on self-assembling of nematic liquid crystal on polymer alignment layers processed with a focused ion beam. Digital control of the beam path allows imprinting patterns that induce different complex distributions of the refractive index within several micrometer thick liquid crystal layers. We optimize them to implement various optical functionalities, such as broadband anomalous refraction, wide-aperture focusing, and beam splitting in tens of channels.

TiO2-Acrylate Nanocomposites Elaborated by UV-Curing with Tunable Properties

2013 ◽  
Vol 200 ◽  
pp. 173-177 ◽  
Author(s):  
J.A. Burunkova ◽  
I.Y. Denisyuk ◽  
Vera Bulgakova ◽  
Sandor Kokenyesi
Keyword(s):  
Refractive Index ◽  
Uv Curing ◽  
High Refractive Index ◽  
Transport Processes ◽  
Holographic Recording ◽  
Holographic Gratings ◽  
Hard Materials ◽  
In Situ Fabrication ◽  
The Matrix ◽  
Relief Formation

Abstract. Homogeneous TiO2–acrylate nanocomposite with low optical scattering were prepared by UV curing. The surface of the nanoparticles was modified by carbonic acids to control the aggregation between the nanoparticles. Effects of TiO2 content on the properties of nanocomposite (transmission, refractive index, mechanical properties, internal structure) were investigated. Depending on the composition of the matrix hard materials with high refractive index or light sensitive layers for holographic recording can be obtained. The first are interesting for medical applications, the last for photonics. For example, TiO2 nanocomposite was used for in situ fabrication of holographic gratings by interference lithography. Formation of the grating samples with high diffraction efficiency (20 %) is based on the light-stimulated mass-transport processes in the polymerized layer during the recording without any additional treatments. The relief formation has been investigated by AFM measurements too. These materials are designed for applications in integrated optics, elements of optics, in nanolithography.

scholarly journals RECORDING TECHNIQUE OF MASKS ON MULTILAYERED COATINGS (Part 1)

2019 ◽  
Vol 8 ◽  
pp. 47-51 ◽  
Author(s):  
Nikita Gurin ◽  
Viktor Korolkov ◽  
Yury Batomunkuev ◽  
Evgeny Spesivtsev
Keyword(s):  
Experimental Study ◽  
Refractive Index ◽  
Laser Radiation ◽  
Absorption Coefficient ◽  
Chromium Oxide ◽  
Visible Spectral Region ◽  
Reflection And Transmission ◽  
Recording Technique ◽  
Multilayered Coatings ◽  
Transmission Coefficients

The aim of the work is an experimental study of the optical characteristics of chromium oxide films, such as the refractive index, absorption coefficient, reflection and transmission coefficients for the visible spectral region. This work is a part of the development of a mask writing technique with focused laser radiation on multilayer absorbing coatings.

Change of the refractive index in PPLN waveguides due to the photorefractive effect

2011 ◽  
Vol 104 (3) ◽  
pp. 547-551 ◽  
Author(s):  
O. Kashin ◽  
M. Homann ◽  
V. Matusevich ◽  
F. Setzpfandt ◽  
T. Pertsch ◽  
...  
Keyword(s):  
Refractive Index ◽  
Photorefractive Effect

scholarly journals Photo-Induced Holographic Recording in an Optically Active Cholesteric Liquid Crystal Layer

2018 ◽  
Vol 4 (1) ◽  
pp. 1-7
Author(s):  
A. Chanishvili ◽  
N. Ponjavidze ◽  
G. Petriashvili ◽  
G. Chilaya ◽  
A. Jullien ◽  
...  
Keyword(s):  
Liquid Crystal ◽  
Cholesteric Liquid Crystal ◽  
Polarization Plane ◽  
Thick Layer ◽  
Light Polarization ◽  
Optically Active ◽  
Holographic Recording ◽  
Isotropic Liquid ◽  
Nonlinear Beam ◽  
Beam Coupling

Abstract A few microns thick layer of an optically active cholesteric liquid crystal is realized by using a photoisomerizable nematic component and a chiral dopant. It is shown that such a photosensitive optically active medium can be used as a holographic material for optical information and dynamic grating recording. The photo-induced gratings are written by exploiting the light-induced photoisomerization phase transition from an optically active chiral liquid crystal to an isotropic liquid, which results in the rotation of the light polarization plane from 90 to 0 degrees and corresponding to maximum, respectively, zero transmittance. The results highlight applications in the field of optical storage by the recording of static gratings, as well as in the feld of nonlinear beam-coupling via the holographic writing of dynamic gratings

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