Dual-mode control of light by two-dimensional periodic structures realized in liquid-crystalline composite materials
Optics Letters, Vol. 35, Issue 16, pp. 2759-2761 (2010)
http://dx.doi.org/10.1364/OL.35.002759
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Abstract
We report on the realization of a 2D refractive structure consisting of a polymer-liquid-crystal polymer slice grid. Nematic liquid crystal microdomains are confined inside well-sculptured elliptical cavities; experimental investigation shows that the liquid crystal director lies in the plane of the structure and its orientation follows a preferred direction. The sample exhibits both an electro-optical and an all-optical response owing to a small percentage of photosensitive azo dye included in the structure. A double external control of the two-dimensional grating efficiency can indeed be operated either by an optical pump beam or by the standard technique of applying a suitable external voltage to the sample.
© 2010 Optical Society of America
OCIS Codes
(050.1950) Diffraction and gratings : Diffraction gratings
(160.3710) Materials : Liquid crystals
(230.1150) Optical devices : All-optical devices
(230.2090) Optical devices : Electro-optical devices
ToC Category:
Holography
History
Original Manuscript: May 12, 2010
Revised Manuscript: July 12, 2010
Manuscript Accepted: July 15, 2010
Published: August 12, 2010
Citation
Luciano De Sio and Cesare Umeton, "Dual-mode control of light by two-dimensional periodic structures realized in liquid-crystalline composite materials," Opt. Lett. 35, 2759-2761 (2010)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-35-16-2759
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