We report on the investigation and characterization of an optically tunable filtering effect, observed in a waveguide grating made of alternated strips of photocurable polymer and a mixture of azo-dye-doped liquid crystal. The grating is sandwiched between two borosilicate glasses, one of which includes an ion-exchanged channel waveguide, which confines the optical signal to be filtered. Exposure to a low power visible light beam modifies the azo-dye molecular configuration, thus allowing the filtered wavelength to be tuned over a 6.6 nm range. Simulations of the filtering response are well described with our experimental findings. © 2011 Optical Society of America.

Observation of tunable optical filtering in photosensitive composite structures containing liquid crystals / Giovanni, Gilardi; DE SIO, Luciano; Romeo, Beccherelli; Asquini, Rita; D'Alessandro, Antonio; Cesare, Umeton. - In: OPTICS LETTERS. - ISSN 0146-9592. - STAMPA. - 36:24(2011), pp. 4755-4757. [10.1364/ol.36.004755]

Observation of tunable optical filtering in photosensitive composite structures containing liquid crystals

DE SIO, LUCIANO;ASQUINI, Rita;D'ALESSANDRO, Antonio;
2011

Abstract

We report on the investigation and characterization of an optically tunable filtering effect, observed in a waveguide grating made of alternated strips of photocurable polymer and a mixture of azo-dye-doped liquid crystal. The grating is sandwiched between two borosilicate glasses, one of which includes an ion-exchanged channel waveguide, which confines the optical signal to be filtered. Exposure to a low power visible light beam modifies the azo-dye molecular configuration, thus allowing the filtered wavelength to be tuned over a 6.6 nm range. Simulations of the filtering response are well described with our experimental findings. © 2011 Optical Society of America.
2011
Integrated optics devices, Liquid crystals, All-optical devices
01 Pubblicazione su rivista::01a Articolo in rivista
Observation of tunable optical filtering in photosensitive composite structures containing liquid crystals / Giovanni, Gilardi; DE SIO, Luciano; Romeo, Beccherelli; Asquini, Rita; D'Alessandro, Antonio; Cesare, Umeton. - In: OPTICS LETTERS. - ISSN 0146-9592. - STAMPA. - 36:24(2011), pp. 4755-4757. [10.1364/ol.36.004755]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/421420
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