Liquid-crystal tunable filter based on sapphire microspheres

We design an integrated optoelectronic device based on the whispering-gallery modes of a sapphire microsphere integrated with a liquid-crystal tuning medium to produce a narrowband, electrically tunable, channel-dropping filter. The sapphire microsphere is glued over a diffused waveguide in a glass...

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Bibliographic Details
Published in:Optics letters 2009-11, Vol.34 (21), p.3253-3255
Main Authors: Gilardi, Giovanni, Donisi, Domenico, Serpengüzel, Ali, Beccherelli, Romeo
Format: Article
Language:English
Online Access:Get full text
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Summary:We design an integrated optoelectronic device based on the whispering-gallery modes of a sapphire microsphere integrated with a liquid-crystal tuning medium to produce a narrowband, electrically tunable, channel-dropping filter. The sapphire microsphere is glued over a diffused waveguide in a glass substrate. At the base of the microsphere, a small volume of liquid crystal is infiltrated. We numerically evaluate the performance of the device and demonstrate a voltage tuning of the narrowband resonances.
ISSN:1539-4794
DOI:10.1364/OL.34.003253