Realization of a liquid crystal electrically controlled optical waveguide on micromachined silicon

Asquini, Rita and Donisi, Domenico and Trotta, Marco and d'Alessandro, Antonio and Bellini, Bob and Gilardi, Giovanni and Beccherelli, Romeo (2009) Realization of a liquid crystal electrically controlled optical waveguide on micromachined silicon. Molecular Crystals and Liquid Crystals, 500. pp. 23-30. ISSN 1542-1406

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Abstract

In this paper we report the major fabrication steps and preliminary electro-optical characterization of a novel integrated liquid crystal optical waveguide on silicon substrate. The optical waveguide is made of a SiO2=Si V-groove with a triangular cross-section filled with nematic liquid crystal E7. The optical propagation in the channel waveguide is controlled by an external voltage which induces a refractive index variation by means of molecular director reorientation. For TM polarized light at a wavelength of 1.55 lm, a threshold voltage of only about 2V and an extinction ratio higher than 35dB were measured with 6.5V applied.

Item Type: Article
Subjects: 600 Tecnologia - Scienze applicate > 620 Ingegneria e attivita' affini
Depositing User: Matteo Viola
Date Deposited: 02 Jan 2013 14:09
Last Modified: 21 Mar 2013 14:57
URI: http://eprints.bice.rm.cnr.it/id/eprint/4450

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