Title
Longitudinally modulated nematic bandgap structure
Abbreviated Journal Title
J. Opt. Soc. Am. B-Opt. Phys.
Keywords
LIQUID-CRYSTALS; SCATTERING; Optics
Abstract
We discuss a planar nematic liquid-crystal structure with the director periodically twisted in the light propagation direction (periodically twisted nematic) as a medium, which exhibits bandgap and strong reflection for any polarization at normal incidence. This is in contrast to the cholesteric liquid crystals, which reflect only one of the two circular polarizations. The size of the bandgap depends on the modulation profile and amplitude, and its maximal magnitude is smaller, but of the same order as the bandgap of cholesterics with similar material parameters (refractive indices and pitch). The second-order bandgap reflection exhibits polarization universality only for large enough modulation. (c) 2006 Optical Society of America.
Journal Title
Journal of the Optical Society of America B-Optical Physics
Volume
23
Issue/Number
8
Publication Date
1-1-2006
Document Type
Article
Language
English
First Page
1712
Last Page
1717
WOS Identifier
ISSN
0740-3224
Recommended Citation
"Longitudinally modulated nematic bandgap structure" (2006). Faculty Bibliography 2000s. 6544.
https://stars.library.ucf.edu/facultybib2000/6544
Comments
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