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Proceedings Paper

Analysis of periodic polymer-dispersed liquid crystal structures for dynamic hologram applications
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Paper Abstract

Electro-optical switching of the diffraction efficiency in volume holographic gratings offers the possibility of real-time control and programmability of diffractive optic components. We have recently demonstrated efficient electro-optical control of the diffraction efficiency in gratings consisting of periodic polymer-dispersed liquid crystal (PDLC) planes. We analyze this system as a rectangular index modulation profile, with the low index region being pure polymer, and the high index region consisting of a distribution of ellipsoidal nematic liquid crystal droplets of sub-micrometer size. The results of coupled-wave theory are combined with an analysis of the electro- mechanical behavior of these droplets to model the field-dependent diffraction efficiency. The effects of system parameters on diffraction switching is explored, and a physical interpretation of the switching phenomena in PDLC gratings is elucidated. Insights to the design of practical switchable diffractive optical elements can be obtained from the model.

Paper Details

Date Published: 22 September 1995
PDF: 10 pages
Proc. SPIE 2532, Application and Theory of Periodic Structures, (22 September 1995); doi: 10.1117/12.221231
Show Author Affiliations
Richard L. Sutherland, Science Applications International Corp. (United States)
Lalgudi V. Natarajan, Science Applications International Corp. (United States)
Vincent P. Tondiglia, Science Applications International Corp. (United States)
Timothy J. Bunning, Science Applications International Corp. (United States)
W. Wade Adams, Air Force Wright Lab. (United States)


Published in SPIE Proceedings Vol. 2532:
Application and Theory of Periodic Structures
Tomasz Jannson, Editor(s)

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