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.

Dual-mode control of light by two-dimensional periodic structures realized in liquid-crystalline composite materials / De Sio, Luciano; Umeton, Cesare. - In: OPTICS LETTERS. - ISSN 0146-9592. - 35:16(2010), pp. 2759-2761. [10.1364/OL.35.002759]

Dual-mode control of light by two-dimensional periodic structures realized in liquid-crystalline composite materials

De Sio, Luciano
;
2010

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.
2010
atomic and molecular physics, and optics
01 Pubblicazione su rivista::01a Articolo in rivista
Dual-mode control of light by two-dimensional periodic structures realized in liquid-crystalline composite materials / De Sio, Luciano; Umeton, Cesare. - In: OPTICS LETTERS. - ISSN 0146-9592. - 35:16(2010), pp. 2759-2761. [10.1364/OL.35.002759]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/1113340
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