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Proceedings Paper

Computational chemistry modeling and design of photoswitchable alignment materials for optically addressable liquid crystal devices
Author(s): K. L. Marshall; E. R. Sekera; K. Xiao
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Paper Abstract

Photoalignment technology based on optically switchable “command surfaces” has been receiving increasing interest for liquid crystal optics and photonics device applications. Azobenzene compounds in the form of low-molar-mass, watersoluble salts deposited either directly on the substrate surface or after dispersion in a polymer binder have been almost exclusively employed for these applications, and ongoing research in the area follows a largely empirical materials design and development approach. Recent computational chemistry advances now afford unprecedented opportunities to develop predictive capabilities that will lead to new photoswitchable alignment layer materials with low switching energies, enhanced bistability, write/erase fatigue resistance, and high laser-damage thresholds. In the work described here, computational methods based on the density functional theory and time-dependent density functional theory were employed to study the impact of molecular structure on optical switching properties in photoswitchable methacrylate and acrylamide polymers functionalized with azobenzene and spiropyran pendants.

Paper Details

Date Published: 5 September 2015
PDF: 15 pages
Proc. SPIE 9565, Liquid Crystals XIX, 95650T (5 September 2015); doi: 10.1117/12.2188287
Show Author Affiliations
K. L. Marshall, Univ. of Rochester (United States)
E. R. Sekera, Univ. of Rochester (United States)
K. Xiao, Univ. of Rochester (United States)

Published in SPIE Proceedings Vol. 9565:
Liquid Crystals XIX
Iam Choon Khoo, Editor(s)

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