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Proceedings Paper

Holographic recording in polymer-dispersed liquid crystals
Author(s): K. Beev; Simeon Sainov; T. Angelov; Alexander G. Petrov
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Paper Abstract

Polymer-dispersed liquid crystals (PDLC) provide the opportunity to achieve reliable, cheap and commercial elements for switchable holographic devices. In the present work holographic recording techniques are used to form switchable gratings in PDLCs. Depending on the initial reactivity of the mixture, Bragg and Raman-Nath gratings are obtained. The first ones show higher efficiency for s-polarization, which does not hold in the case of Raman-Nath gratings Different exposure power of the writing beams results in different diffraction efficiency. The switching characteristics of the recorded gratings are studied. The switch-off state is obtained at about 2V/μm for p-polarization in the first diffracted order in thin (Raman-Nath) gratings. The angular selectivity of these gratings is also investigated. The influence of the reconstructing wave polarization azimuth on the diffraction efficiency is studied.

Paper Details

Date Published: 22 April 2005
PDF: 5 pages
Proc. SPIE 5830, 13th International School on Quantum Electronics: Laser Physics and Applications, (22 April 2005); doi: 10.1117/12.618403
Show Author Affiliations
K. Beev, Central Lab. of Optical Storage and Processing of Information (Bulgaria)
Simeon Sainov, Central Lab. of Optical Storage and Processing of Information (Bulgaria)
T. Angelov, Institute of Solid State Physics (Bulgaria)
Alexander G. Petrov, Institute of Solid State Physics (Bulgaria)


Published in SPIE Proceedings Vol. 5830:
13th International School on Quantum Electronics: Laser Physics and Applications
Peter A. Atanasov; Sanka V. Gateva; Lachezar A. Avramov; Alexander A. Serafetinides, Editor(s)

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