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Optics Letters

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  • Editor: Anthony J. Campillo
  • Vol. 31, Iss. 11 — Jun. 1, 2006
  • pp: 1678–1680

Polarization-universal bandgap in periodically twisted nematics

Hakob Sarkissian, Boris Ya. Zeldovich, and Nelson V. Tabiryan  »View Author Affiliations


Optics Letters, Vol. 31, Issue 11, pp. 1678-1680 (2006)
http://dx.doi.org/10.1364/OL.31.001678


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Abstract

Cholesteric liquid crystals are known to possess bandgap and exhibit strong reflection for one of two circular polarizations of light. We suggest a periodically twisted nematic liquid crystal as a medium, which possesses bandgap and exhibits strong reflection for any polarization of normally incident light. Two possible structures are considered: a sinusoidal modulation profile and a rectangular modulation profile. In both cases, the maximum bandgap of a periodically twisted structure is approximately twice as narrow as that of cholesterics. However, the polarization properties of these structures may make them more advantageous than cholesterics in a variety of applications.

© 2006 Optical Society of America

OCIS Codes
(090.7330) Holography : Volume gratings
(160.3710) Materials : Liquid crystals
(230.3720) Optical devices : Liquid-crystal devices

ToC Category:
Materials

History
Original Manuscript: February 24, 2006
Revised Manuscript: March 7, 2006

Citation
Hakob Sarkissian, Boris Ya. Zeldovich, and Nelson V. Tabiryan, "Polarization-universal bandgap in periodically twisted nematics," Opt. Lett. 31, 1678-1680 (2006)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-31-11-1678


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