TITLE

All-optical switching in an optofluidic polydimethylsiloxane: Liquid crystal grating defined by cast-molding

AUTHOR(S)
De Sio, Luciano; Cuennet, Julien G.; Vasdekis, Andreas E.; Psaltis, Demetri
PUB. DATE
March 2010
SOURCE
Applied Physics Letters;3/29/2010, Vol. 96 Issue 13, p131112
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
We report an optofluidic photoswitchable grating, based on a polydimethylsiloxane periodic structure on a glass substrate, separated by a thin liquid crystal film. The polydimethylsiloxane microstructure was realized via high resolution replica molding and was employed to both confine and align a photosensitive nematic liquid crystal. In the absence of any surface treatment, the liquid crystal exhibited homeotropic alignment. By inducing planar alignment on the glass substrate, a hybrid orientation of the liquid crystal was achieved, inducing polarization sensitive transmission. The photosensitivity of the liquid crystal enabled the all-optical control of the grating transmission and 20% diffraction efficiency was measured.
ACCESSION #
48943858

 

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