Surface-assisted optical storage in a nematic liquid crystal cell via photoinduced charge-density modulation

被引：11

作者：

Miniewicz, A. ^{[1
]}

Komorowska, K. ^{[1
]}

Vanhanen, J. ^{[1
]}

Parka, J. ^{[2
]}

机构：

[1] Wroclaw Univ Technol, Inst Phys & Theoret Chem, PL-50370 Wroclaw, Poland

[2] Mil Univ Technol, Inst Tech Phys, Warsaw, Poland

来源：

ORGANIC ELECTRONICS | 2001年 / 2卷 / 3-4期

关键词：

Nematic liquid crystal; Optical storage; Holographic grating recording; Photoinduced charge-density modulation;

D O I：

10.1016/S1566-1199(01)00021-0

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

This study reports the observation of quasi-permanent recording of holographic gratings in a twisted nematic liquid crystal cell by He Ne 632.8 nm laser light. The cell is equipped with blocking SiO2 layers and polyimide insulating/alignment layers and filled with liquid crystalline 6CHBT, doped with an anthraquinone derivative dye. Photogeneration in the bulk of the liquid crystal, photocurrent flow, and loading of the surface with spatially modulated charge density are the major mechanisms which lead to surface electric field induced director reorientation. The novelty of the system described by us is the possibility of ac frequency tuning of the intensity of light diffracted at the so formed refractive index grating. (C) 2001 Elsevier Science B.V. All rights reserved.

引用

页码：155 / 163

页数：9