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EnglishWe 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 azodye 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. (C) 2011 Optical Society of America
Observation of tunable optical filtering in photosensitive composite structures containing liquid crystals / Gilardi, G; De Sio, L; Beccherelli, R; Asquini, R; D'Alessandro, A; Umeton, Cesare Paolo. - In: OPTICS LETTERS. - ISSN 0146-9592. - 36:24(2011), pp. 4755-4757.
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| Titolo: | Observation of tunable optical filtering in photosensitive composite structures containing liquid crystals |
| Autori: | |
| Data di pubblicazione: | 2011 |
| Rivista: | |
| Citazione: | Observation of tunable optical filtering in photosensitive composite structures containing liquid crystals / Gilardi, G; De Sio, L; Beccherelli, R; Asquini, R; D'Alessandro, A; Umeton, Cesare Paolo. - In: OPTICS LETTERS. - ISSN 0146-9592. - 36:24(2011), pp. 4755-4757. |
| 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 azodye 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. (C) 2011 Optical Society of America |
| Handle: | http://hdl.handle.net/20.500.11770/152939 |
| Appare nelle tipologie: | 1.1 Articolo in rivista |
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