9 June 2006 New holographic gratings recorded in polymer-dispersed liquid crystals
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Proceedings Volume 6252, Holography 2005: International Conference on Holography, Optical Recording, and Processing of Information; 62522B (2006) https://doi.org/10.1117/12.677298
Event: Holography 2005: International Conference on Holography, Optical Recording, and Processing of Information, 2005, Varna, Bulgaria
Abstract
Holographic gratings recorded in polymer-dispersed liquid crystals (H-PDLC) are very interesting as systems for electrically switchable diffractive devices. From the early 1990s, experiments, Bragg and Raman-Nath gratings are recorded in PDLC. A very thorough review of these investigations is published recently. In this paper we report our first experiments for H-PDLC gratings, recorded in two different optical arrangements using total internal reflection (TIR): 1) Stetson's scheme - when low and high spatial frequencies gratings are simultaneously recorded in the PDLC's volume, and 2) Nassenstein's scheme - when low or high spatial frequency grating is recorded with evanescent waves in very thin layer of the PDLC. A polarization grating recorded by the Stetson's scheme is also reported. The realtime diffraction efficiency dependence during the recording and the polarization characteristics are investigated.
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K. Beev, L. Criante, D. E. Lucchetta, F. Simoni, S. Sainov, "New holographic gratings recorded in polymer-dispersed liquid crystals", Proc. SPIE 6252, Holography 2005: International Conference on Holography, Optical Recording, and Processing of Information, 62522B (9 June 2006); doi: 10.1117/12.677298; https://doi.org/10.1117/12.677298
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