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

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. © 2010 American Institute of Physics.


Published in:
Applied Physics Letters, 96, 13, 131112
Year:
2010
ISSN:
00036951
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Other identifiers:
Scopus: 2-s2.0-77950465240
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 Record created 2010-11-23, last modified 2018-05-17

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