Open AccessBichromatic optical switch of diffractive light from a BCT photonic crystal based on an azo component-doped HPDLC
Author(s) -
Ming Shian Li,
Andy Ying–Guey Fuh,
Jui Hsiang Liu,
ShuChen Wu
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.20.025545
Subject(s) - materials science , optics , optical switch , optoelectronics , photonic crystal , liquid crystal , laser , holography , diffraction efficiency , photonics , doping , interference (communication) , grating , telecommunications , physics , channel (broadcasting) , computer science
This study demonstrates all optical switches between the four diffractive light levels of a body-centered tetragonal photonic crystal. The sample is based on holographic polymer-dispersed liquid crystals that are fabricated using a two-beam interference with multiple exposures. The switching mechanism bases on the effective index modulation of the PC that contains a liquid crystal/azo-dye mixture could be controlled by two pumping laser beams. The switching time between the blue-laser-pumped and the blue-and-green-laser-pumped levels is fast. The study also discusses the switching time of the various levels.