PMID: 15244599Jul 13, 2004Paper

Photorefractive effect due to a photoinduced surface-charge modulation in undoped liquid crystals

Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics
P Pagliusi, G Cipparrone

Abstract

We demonstrate that some peculiarities of the surface-induced photorefractive effect (SIPRE) in undoped nematic planar cells can be simply explained considering the electric field induced by a modulated surface-charge distribution. Polarization-dependent forced light scattering and two-beam coupling experiments indicate that the observed anisotropy of the diffraction efficiency and the energy transfer between the pump beams strongly depend on the experimental geometry. The investigation suggests that the unusual dichotomy between local and nonlocal behavior can be ascribed to a modulated longitudinal electric field component, in phase with the interference pattern, which is not accountable by the conventional photorefractivity. In a simple and general approach we demonstrate that the conceived charge distribution model for the SIPRE produces a space-charge field having two orthogonal modulated components, in-phase and pi/2 out of phase, respectively. The electric field configuration within the nematic sample gives reason for the main experimental features.

References

Apr 8, 1991·Physical Review Letters·S DucharmeW E Moerner
Mar 23, 2002·Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics·D OliveroG Barbero
Dec 19, 2003·Optics Letters·Pasquale Pagliusi, Gabriella Cipparrone
Oct 1, 1993·Optics Letters·R F NabievD Botez

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Citations

Jun 6, 2008·Mayo Clinic Proceedings·Christine M Huang
Dec 31, 2005·Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics·C A R YednakL R Evangelista
Mar 5, 2009·Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics·V O KubytskyiS J Cox
Nov 26, 2009·Applied Optics·Yong ZhangXiudong Sun
May 9, 2009·Applied Optics·Yanbo PeiXiudong Sun
Mar 14, 2013·Optics Express·Ying XiangZheng-Dong Cheng

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