A switchable liquid-crystal optical channel waveguide on silicon

Donisi, Domenico and Bellini, Bob and Beccherelli, Romeo and Asquini, Rita and Gilardi, Giovanni and Trotta, Marco and d'Alessandro, Antonio (2010) A switchable liquid-crystal optical channel waveguide on silicon. IEEE Journal of Quantum Electronics , 46 (5). pp. 762-768. ISSN 0018-9197

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An integrated optical switch based on liquid crystal on silicon is reported. The switch consists of an optical waveguide, whose core is made of nematic liquid crystal E7 infiltrated in a SiO Si V-groove. The electrooptic effect allows us to control the waveguide propagation condition by means of ITO and Si electrodes. A voltage as low as 2 V applied to the driving electrodes turns the waveguide on. Since the output intensity increases with voltage, the waveguide behaves also as a variable optical attenuator. A maximum ON–OFF extinction ratio in excess of 44 dB was measured.

Item Type: Article
Subjects: 600 Tecnologia - Scienze applicate > 620 Ingegneria e attivita' affini
Depositing User: Matteo Viola
Date Deposited: 03 Jan 2013 14:56
Last Modified: 17 Apr 2014 08:21
URI: http://eprints.bice.rm.cnr.it/id/eprint/4469

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