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Type: 
Journal
Description: 
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 SiO2/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.
Publisher: 
IEEE
Publication date: 
1 May 2010
Authors: 

Domenico Donisi, Bob Bellini, Romeo Beccherelli, Rita Asquini, Giovanni Gilardi, Marco Trotta, Antonio d'Alessandro

Biblio References: 
Volume: 46 Issue: 5 Pages: 762-768
Origin: 
IEEE Journal of Quantum Electronics