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Proceedings Paper

Tunable holographic gratings based on cross-linked liquid-crystalline polymers in nematic liquid crystals (Conference Presentation)
Author(s): Kyung Min Lee; Vincent P. Tondiglia; Timothy J. Bunning; Timothy J. White; Michael E. McConney

Paper Abstract

Holographic reflection gratings formed by photopolymerization of low concentrations of liquid crystal monomers in nematic liquids demonstrate greater than 150nm of red tuning when a direct current (DC) field is applied across standard liquid crystal cell. The band position is restored when the field is removed. Diffraction efficiencies are both polarization and temperature polarization dependent. Samples are prepared using various LC mixtures, formulated from 2wt% photoinitiator, 5~20 wt% liquid crystal monomers and positive dielectric anisotropy liquid crystals. The basic tuning mechanism will be discussed, along with electric field, temperature effects on the optical performance.

Paper Details

Date Published: 4 March 2019
Proc. SPIE 10944, Practical Holography XXXIII: Displays, Materials, and Applications, 1094406 (4 March 2019); doi: 10.1117/12.2510438
Show Author Affiliations
Kyung Min Lee, Air Force Research Lab. (United States)
Vincent P. Tondiglia, Air Force Research Lab. (United States)
Timothy J. Bunning, Air Force Research Lab. (United States)
Timothy J. White, Univ. of Colorado Boulder (United States)
Michael E. McConney, Air Force Research Lab. (United States)

Published in SPIE Proceedings Vol. 10944:
Practical Holography XXXIII: Displays, Materials, and Applications
Hans I. Bjelkhagen; V. Michael Bove Jr., Editor(s)

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