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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 18, Iss. 21 — Oct. 11, 2010
  • pp: 22572–22577

Cholesteric liquid crystal devices with nanoparticle aggregation

Shie-Chang Jeng, Shug-June Hwang, Yu-Hsiang Hung, and Sheng-Chieh Chen  »View Author Affiliations


Optics Express, Vol. 18, Issue 21, pp. 22572-22577 (2010)
http://dx.doi.org/10.1364/OE.18.022572


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Abstract

A broadband cholesteric liquid crystal (CLC) device with a multi-domain structure is demonstrated by using an aggregation of polyhedral oligomeric silsesquioxane (POSS) nanoparticles in the CLC layer. The aggregation pattern of the self-assembled POSS nanoparticles depends on the concentration of POSS doped in the mixture of POSS/CLC and the cooling rate of the mixture from a temperature higher than the clear point. POSS-induced changes in the bulk and surface properties of the cholesteric cells, such as a promotion of homeotropic alignment, help to form a cholesteric structure with a broadband reflection of light; the latter can be used for improvement of bistable CLC devices. A higher POSS concentration and a higher cooling rate both improve the appearance of the black-white CLC device.

© 2010 OSA

OCIS Codes
(160.3710) Materials : Liquid crystals
(160.4236) Materials : Nanomaterials

ToC Category:
Optical Devices

History
Original Manuscript: September 15, 2010
Revised Manuscript: October 3, 2010
Manuscript Accepted: October 3, 2010
Published: October 8, 2010

Virtual Issues
November 12, 2010 Spotlight on Optics

Citation
Shie-Chang Jeng, Shug-June Hwang, Yu-Hsiang Hung, and Sheng-Chieh Chen, "Cholesteric liquid crystal devices with nanoparticle aggregation," Opt. Express 18, 22572-22577 (2010)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-18-21-22572


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