This website uses cookies.
We use cookies to improve your online experience. By continuing to use our website we assume you agree to the placement of these cookies.
To learn more, you can find in our Privacy Policy.
Original paper

Nonlinear all-optical light valves fabricated on mesoscopic Ti-, Si-substrates

Volume: 267, Pages: 34 - 37
Published: Feb 1, 2018
Abstract
Nonlinear optical properties are investigated in new composite materials. The investigated samples have been (i) a glass substrate covered by mesostructured (SiO2 or TiO2) film filled with the dye Rhodamine 6G, and (ii) a hybrid liquid crystal (LC) cell made on such mesostructured film. The nonlinear optical coefficients have been defined by two different techniques: the degenerate two-wave mixing in the regime of Raman-Nath self-diffraction,...
Paper Details
Title
Nonlinear all-optical light valves fabricated on mesoscopic Ti-, Si-substrates
Published Date
Feb 1, 2018
Volume
267
Pages
34 - 37
References15
Other
# 1Matthew Adams(BT Group (United Kingdom))
32
Original paper
# 1F. L. S. Cuppo(USP: Universidade de São Paulo)
11
# 2A. M. Figueiredo Neto(USP: Universidade de São Paulo)
29
Last. Peter Palffy‐Muhoray(KSU: Kent State University)
42
We carried out Z-scan measurements on lyotropic liquid crystals and on lyotropic liquid crystals doped with ferrofluid. In these experiments, the sample is translated through the focal region of a focused Gaussian laser beam. The dependence of the far-field intensity on sample position due to intensity-dependent optical nonlinearities has been analyzed on the basis of the thermal-lens model of Gordon et al. and the Gaussian decomposition analysis of Sheik-Bahae et al. The thermal-lens model is n...
Original paper
Mar 15, 2000·Optics Letters3.10
# 1J. Zhang(CWRU: Case Western Reserve University)
5
# 2Victor Ostroverkhov(CWRU: Case Western Reserve University)
15
Last. Yu. Reznikov(IOP: Institute of Physics)
20
Photorefractive diffraction gratings were studied in cells of homeotropically aligned pentyl-cyanobiphenyl liquid crystal. These holographic gratings were induced by the simultaneous and nonsimultaneous application of dc and coherent optical electric fields. The observed behavior was consistent with a predominantly surface-mediated photorefractive effect. Beam coupling was observed in all cases and led to a model involving screened and unscreened interfacial trapped charges driving a modulation ...
Original paper
# 1Malgosia Kaczmarek(University of Southampton)
23
# 2A. Dyadyusha(University of Southampton)
11
Last. I. C. Khoo(PSU: Pennsylvania State University)
20
In liquid crystal cells with photoconductive poly(N-vinlylcarbazole) polymer layers, an external dc field can be completely screened by surface charge layers that develop at the liquid crystal–polymer interface. Under spatially modulated illumination, surface charge layers can be discharged in bright areas and lead to reorientation and spatially modulated Freedericksz transition. As a result, an asymmetric energy exchange in the photorefractive two-beam coupling process can take place. We propos...
Review paper
# 1Sergio L. Gómez(USP: Universidade de São Paulo)
10
# 2F. L. S. Cuppo(USP: Universidade de São Paulo)
11
Last. A. M. Figueiredo Neto(USP: Universidade de São Paulo)
29
We present a review of experimental data on the nonlinear optical properties of thermotropic and lyotropic liquid crystals probed by the Z-scan technique. Depending on the time scale, different processes originate a nonlinear optical response. Particularly, at nanosecond range, the physical processes associated with the nonlinear response in thermotropics are not completely understood. In lyotropics, the nonlinear response at ms time scale is from thermal origin and depends on the particular mes...
Original paper
# 1U. Bortolozzo(CNRS: Centre National de la Recherche Scientifique)
29
# 2S. Residori(UCA: Université Côte d'Azur)
32
Last. Jean‐Pierre Huignard(Thales (France))
40
Photorefractive liquid crystal light valves (LCLVs) are hybrid devices that combine a nematic liquid crystal layer with a thin monocrystalline Bi12SiO20 (BSO) photorefractive crystal in the form of a cell wall. The device behaves as an optically addressed spatial light modulator, where the photoconductive layer is made of the BSO crystal. Differently from conventional types of spatial light modulators, usually working in retroreflective configuration, the photorefractive light valves work in tra...
Original paper
Jan 1, 2007·Optics Express3.20
# 1E. Reynoso Lara(INAOE: National Institute of Astrophysics, Optics and Electronics)
5
# 2Zulema Navarrete Meza(INAOE: National Institute of Astrophysics, Optics and Electronics)
1
Last. M. L. Arroyo Carrasco(BUAP: Benemérita Universidad Autónoma de Puebla)
10
In this paper the response purely refractive of a thin nonlinear material, in the z-scan technique experiment, is modeled as a lens with a focal length that is a function of some integer power of the incident beam radius. We demonstrate that different functional dependences of the photoinduced lens of a thin nonlinear material give typical z-scan curves with special features. The analysis is based on the propagation of Gaussian beams in the approximation of thin lens and small distortion for the...
Original paper
Jan 15, 2006·Optics Letters3.10
# 1G. Klimusheva(IOP: Institute of Physics)
13
# 2S. Bugaychuk(IOP: Institute of Physics)
11
Last. A. A. Ishchenko(Institute of Organic Chemistry)
29
Recordings of dynamic holograms with microsecond relaxation times under the action of nanosecond laser pulses are obtained in composites on the base of a novel class of liquid crystals (LCs) in ionic metal-alkanoates. Holographic parameters and relaxation characteristics are measured for doped lyotropic ionic LC, for sandwichlike cells (consisting of a dye layer and a layer of the lyotropic ionic LC), and for colored ionic smectic glasses. The structure of the materials is investigated by use of...
Original paper
# 1Platon Korneychuk(FZÚ AV ČR: Czech Academy of Sciences, Institute of Physics)
2
# 2А. Г. Терещенко(FZÚ AV ČR: Czech Academy of Sciences, Institute of Physics)
10
Last. Kenneth D. Singer(CWRU: Case Western Reserve University)
35
We have carried out studies of photoinduced diffraction in a homeotropically aligned liquid-crystal cell on indium tin oxide with no alignment layer deposited between the electrodes and the liquid crystal. We have observed diffractive components from both persistent hidden gratings and transient gratings formed in the presence of a dc electric field and two coherent pump beams. Our experiments suggest that these persistent hidden gratings are due to a light-induced modulation of the surface char...
1
2
Step 1. Scroll down for details & analytics related to the paper.
Discover a range of citation analytics, paper references, a list of cited papers, and more.