We report on the realization and characterization of a 'free space' diffractive optical filter based on a periodic structure realized in soft composite materials. By combining a high stability optical holographic setup with a light sensitive composite mixture, we have realized a structure made of polymeric slices alternated to pure, well aligned, nematic liquid crystals. Its polarization dependent diffractive properties have been exploited for realizing a diffractive, band-gap based, broadband optical filter. The sample is characterized in terms of its morphological, optical and electro-optical properties. We show that both electric fields and temperature variations can be exploited to tune the position of the diffractive band-gap of about 83 nm and 116 nm respectively. © 2014 IOP Publishing Ltd.

Tuneable broadband optical filter based on soft-composite materials / De Sio, Luciano; Caligiuri, Vincenzo; Umeton, Cesare. - In: JOURNAL OF OPTICS. - ISSN 2040-8978. - 16:6(2014), p. 065703. [10.1088/2040-8978/16/6/065703]

Tuneable broadband optical filter based on soft-composite materials

De Sio, Luciano;
2014

Abstract

We report on the realization and characterization of a 'free space' diffractive optical filter based on a periodic structure realized in soft composite materials. By combining a high stability optical holographic setup with a light sensitive composite mixture, we have realized a structure made of polymeric slices alternated to pure, well aligned, nematic liquid crystals. Its polarization dependent diffractive properties have been exploited for realizing a diffractive, band-gap based, broadband optical filter. The sample is characterized in terms of its morphological, optical and electro-optical properties. We show that both electric fields and temperature variations can be exploited to tune the position of the diffractive band-gap of about 83 nm and 116 nm respectively. © 2014 IOP Publishing Ltd.
2014
diffraction gratings; liquid crystals; polymers; electronic, optical and magnetic materials; atomic and molecular physics, and optics
01 Pubblicazione su rivista::01a Articolo in rivista
Tuneable broadband optical filter based on soft-composite materials / De Sio, Luciano; Caligiuri, Vincenzo; Umeton, Cesare. - In: JOURNAL OF OPTICS. - ISSN 2040-8978. - 16:6(2014), p. 065703. [10.1088/2040-8978/16/6/065703]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/1113584
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