Photorefractive polymer-dispersed liquid crystal based on a photoconducting polysiloxane

Paelke, Lutz; Kitzerow, Heinz-S.; Strohriegl, Peter
January 2005
Applied Physics Letters;1/17/2005, Vol. 86 Issue 3, p031104
Academic Journal
The photorefractive effect in a photoconducting polymer containing small liquid crystal droplets is studied. Two beam coupling experiments indicate a high optical gain at moderate field strength (>50 cm-1 at 10 V/μm). The writing of photorefractive gratings is reversible. The dynamic behavior can be described by a two step process of the grating formation, the faster time constants being of the order of 100 ms. Modulation of the external voltage indicates that the reorientation of the director in the liquid crystals droplets is faster than the rise and decay times of the space charge field.


Related Articles

  • Photonic guiding structures in lithium niobate crystals produced by energetic ion beams. Chen, Feng // Journal of Applied Physics;Oct2009, Vol. 106 Issue 8, p081101 

    A range of ion beam techniques have been used to fabricate a variety of photonic guiding structures in the well-known lithium niobate (LiNbO3 or LN) crystals that are of great importance in integrated photonics/optics. This paper reviews the up-to-date research progress of ion-beam-processed...

  • Photodielectric effect and “Configuration” modes of bistable centers in the CdF2: Ga crystal. Ritus, A. I.; Anzin, V. B.; Volkov, A. A. // Journal of Experimental & Theoretical Physics;Sep2008, Vol. 107 Issue 3, p482 

    A photoinduced increase in the real (ɛ′) and imaginary (ɛ″) parts of the permittivity (Δɛ′ ≈ 0.23 and Δɛ″ ≈ 0.10 at a frequency of 15 cm−1) is revealed experimentally. This photodielectric effect is adequately described by the...

  • Cloud Ice Crystal Classification Using a 95-GHz Polarimetric Radar. Aydin, K.; Singh, J. // Journal of Atmospheric & Oceanic Technology;Nov2004, Vol. 21 Issue 11, p1679 

    Two algorithms are presented for ice crystal classification using 95-GHz polarimetric radar observables and air temperature (T). Both are based on a fuzzy logic scheme. Ice crystals are classified as columnar crystals (CC), planar crystals (PC), mixtures of PC and small- to medium-sized...

  • Diode-Pumped High Energy and High Average Power All-Solid-State Picosecond Amplifier Systems. Jiaxing Liu; Wei Wang; Zhaohua Wang; Zhiguo Lv; Zhiyuan Zhang; Zhiyi Wei // Applied Sciences (2076-3417);2015, Vol. 5 Issue 4, p1590 

    We present our research on the high energy picosecond laser operating at a repetition rate of 1 kHz and the high average power picosecond laser running at 100 kHz based on bulk Nd-doped crystals. With diode-pumped solid state (DPSS) hybrid amplifiers consisting of a picosecond oscillator, a...

  • Radiative recombination in BiI3(Mn) and BiI3(Cr) layered single crystals. Motsnyi, F. V.; Dorogan, V. G. // Semiconductor Physics, Quantum Electronics & Optoelectronics;2004, Vol. 7 Issue 4, p380 

    The photoluminescence spectra of BiI3(Mn) and BiI3(Cr) single crystals were studied. The new bands at ? = 1.1 and ? = 1.83 pm were registered at the temperature 4.2 K. It was shown that the first and second bands arise due to Mn2+ and Cr3+ ions, accordingly. The experimental results were...

  • Defect structure and ionic conductivity of Ca1 - xSc xF2 + x (0.02 = x = 0.15) single crystals. Sulyanova, E.; Molchanov, V.; Sorokin, N.; Karimov, D.; Sulyanov, S.; Sobolev, B. // Crystallography Reports;Jul2009, Vol. 54 Issue 4, p572 

    Single crystals of the Ca1 - xSc xF2 + x( x = 0.106, 0.132, 0.156) solid solutions (CaF2 structure type, space group Fm $$ \bar 3 $$ m) are investigated using X-ray diffraction. It is revealed that the crystals under investigation contain vacancies in the 8 c positions and interstitial fluorine...

  • Cation distribution and interatomic interactions in oxides with heterovalent isomorphism: XI. (La1−xHox)2SrAl2O7 solid solutions. Zvereva, I. A.; Isaeva, A. S.; Choisnet, J. // Russian Journal of General Chemistry;Jun2006, Vol. 76 Issue 6, p875 

    Interatomic distances and distributions of rare-earth and strontium cations over two sites in the structure of (La1− x Hox)2SrAl2O7 solid solutions were determined by means of full-profile X-ray structural analysis. Introduction of holmium cations into the La2SrAl2O7 oxide results in...

  • Irradiation-Induced Suppression of the Critical Temperature in High-Tc Superconductors: Pair Breaking Versus Phase Fluctuations. Openov, L. A. // JETP Letters;1/10/2005, Vol. 81 Issue 1, p39 

    Experiments on the irradiation-induced suppression of the critical temperature in high-Tc superconductors are analyzed within the mean-field Abrikosov-Gor’kov-like approach. It is shown that the experimental data for YBa2Cu3O7 – δ single crystals can be quantitatively explained...

  • Interrelation between Anharmonicity and Lateral Strain in Quasi-Isotropic Polycrystalline Solids. Belomestnykh, V. N.; Tesleva, E. P. // Technical Physics;Aug2004, Vol. 49 Issue 8, p1098 

    School of Government University of Tasmania A new formula that relates the acoustic Grüneisen parameter to the Poisson ratio is suggested on the basis of the previously derived expression for this parameter.


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics