Open AccessFast response beam coupling in liquid crystal cells sandwiched between ZnSe substrates
Author(s) -
Chao Lian,
Hua Zhao,
Yanbo Pei,
Xingming Sun,
Jingwen Zhang
Publication year - 2012
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.20.015843
Subject(s) - photorefractive effect , materials science , electric field , liquid crystal , optics , terahertz radiation , optoelectronics , crystal (programming language) , doping , beam (structure) , coupling (piping) , mixing (physics) , physics , quantum mechanics , computer science , metallurgy , programming language
Fast responses (20 ms rising time) both in symmetrical two-wave and degenerate-four-wave mixing experiments were observed and investigated in C(60) doped 4,4'-n-pentylcyanobiphenyl liquid crystal cells sandwiched between bare ZnSe substrates with an electric field applied parallel to the cell surfaces. The ZnSe material seems responsible for the fast response due to its excellent charge carrier transportation capability. Strong fanning effect and transient features were seen and studied, hinting super strong photorefractive effect in the material system. This low voltage operated liquid crystal based photorefractive approach is promising in real time applications over visible to terahertz regime.