All-optical switching and multistability in photonic structures with liquid crystal defects

Details All-optical switching and multistability in photonic structures with liquid crystal defects All-optical switching and multistability in photonic structures with liquid crystal defects

2007-12-24

arxiv.org/abs/0712.3986v1

Physics

Condensed Matter

Soft Condensed Matter

4 pages, 3 figures

Scientific paper

10.1063/1.2949076

We demonstrate that one-dimensional photonic crystals with pure nematic liquid-crystal defects can operate as all-optical switching devices based on optical orientational nonlinearities of liquid crystals. We show that such a periodic structure is responsible for a modulated threshold of the optical Fr\'eedericksz transition in the spectral domain, and this leads to all-optical switching and light-induced multistability. This effect has no quasi-statics electric field analogue, and it results from nonlinear coupling between light and a defect mode.

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