Bichromatic optical switch of diffractive light from a BCT photonic crystal based on an azo component-doped HPDLC

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 mechani...

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Bibliographic Details
Published in:Optics express 2012-11, Vol.20 (23), p.25545-25553
Main Authors: Li, Ming Shian, Fuh, Andy Ying-Guey, Liu, Jui-Hsiang, Wu, Shing-Trong
Format: Article
Language:English
Subjects:
Algorithms
Computer Simulation
Crystallization
Holography - methods
Lasers
Light
Liquid Crystals
Models, Statistical
Optics and Photonics
Photons
Polymers - chemistry
Time Factors
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Summary: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.
ISSN:1094-4087
1094-4087
DOI:10.1364/OE.20.025545