Gilardi, Giovanni and De Sio, Luciano and Beccherelli, Romeo and Asquini, Rita and d'Alessandro, Antonio and Umeton, Cesare (2011) Observation of tunable optical filtering in photosensitive composite structures containing liquid crystals. Optics Letters, 36 (24). pp. 4755-4757. ISSN 0146-9592
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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.
| Item Type: | Article |
|---|---|
| Subjects: | 600 Tecnologia - Scienze applicate > 620 Ingegneria e attivita' affini |
| Depositing User: | Matteo Viola |
| Date Deposited: | 12 Mar 2013 15:51 |
| Last Modified: | 21 Mar 2013 17:50 |
| URI: | http://eprints.bice.rm.cnr.it/id/eprint/4555 |
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