Resumo

REYES-AVENDANO, J.A  e  HALEVI, P. Electrical tuning of refraction in a two-dimensional photonic crystal infilled with a liquid crystal. Rev. mex. fis. [online]. 2008, vol.54, n.6, pp.407-410. ISSN 0035-001X.

We study a novel electro-optic structure with potential applications for ray steering, optical multiplexers, logic gates or switches. Our idea is based on the electrical tuning of refraction in a two-dimensional photonic crystal infilled by a liquid-crystal, with a direct-current electric field applied parallel to the cylinders. Using a two-step homogenization process, we show that, for sufficiently low frequencies, this structure can be represented by two field-dependent effective refractive indices. We demonstrate that the direction of the ordinary and extraordinary refracted rays can be sensitively tuned by varying the magnitude of the applied field.

Palavras-chave : Photonic crystals; liquid crystals; optical properties.

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