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Electrical Reorientation of Liquid Crystal within Silicon Macropore for Photonic Devices

We present the simulation results for the local director distribution of a nematic liquid crystal (NLC) confined inside cylindrical macropores of porous silicon (PS). The Frank free energy approach is used to describe the equilibrium configuration of the NLC in porous media. The influence of the mol...

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Main Authors:	Dyomin, A.A., Tkachenko, G.V., Tkachenko, V., Abbate, G., De Stefano, L., Sukhoivanov, I.A.
Format:	Conference Proceeding
Language:	English
Subjects:	director distribution Liquid crystal devices Liquid crystals Nonhomogeneous media Optical refraction Optical tuning Optical variables control Photonic crystals porous silicon Reflectivity Refractive index Silicon tunable microcavity
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creator	Dyomin, A.A. Tkachenko, G.V. Tkachenko, V. Abbate, G. De Stefano, L. Sukhoivanov, I.A.
description	We present the simulation results for the local director distribution of a nematic liquid crystal (NLC) confined inside cylindrical macropores of porous silicon (PS). The Frank free energy approach is used to describe the equilibrium configuration of the NLC in porous media. The influence of the molecular anchoring strength and of an externally applied electric field is investigated. Bruggeman approximation is used while calculating the effective refractive index of each layer in a PS multilayer structure. The reflectivity spectrum of the latter is simulated using the transfer matrix approach. Electrical tuning of a NLC-PS optical microcavity designed for resonance at lambda = 1330 nm is demonstrated. Tuning range varies from 8.5 nm up to 16 nm for weak and strong surface anchoring conditions, respectively.
doi_str_mv	10.1109/ICTON.2007.4296405
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identifier	ISSN: 2162-7339
ispartof	2007 9th International Conference on Transparent Optical Networks, 2007, Vol.4, p.301-304
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source	IEEE Electronic Library (IEL) Conference Proceedings
subjects	director distribution Liquid crystal devices Liquid crystals Nonhomogeneous media Optical refraction Optical tuning Optical variables control Photonic crystals porous silicon Reflectivity Refractive index Silicon tunable microcavity
title	Electrical Reorientation of Liquid Crystal within Silicon Macropore for Photonic Devices
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