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Optics Express

Optics Express

  • Editor: Andrew M. Weiner
  • Vol. 21, Iss. 19 — Sep. 23, 2013
  • pp: 21840–21846

Direct optical switching of bistable cholesteric textures in chiral azobenzene-doped liquid crystals

Andy Ying-Guey Fuh, Zong-Han Wu, Ko-Ting Cheng, Cheng-Kai Liu, and Yuan-Di Chen  »View Author Affiliations

Optics Express, Vol. 21, Issue 19, pp. 21840-21846 (2013)

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The direct optical switching of bistable cholesteric textures (i.e., planar and focal conic textures) in chiral azobenzene-doped liquid crystals (LCs) is demonstrated. Chiral azobenzene is a chiral dopant with optically tuned helical twisting power that results from the photo-isomerization between trans- and cis- isomers via exposure to UV or visible light. The pitch length of the material can be optically and repeatedly elongated and shortened. With regard to free energy, LCs tend to be stable at planar (focal conic) textures when pitch length is elongated (shortened) by exposure to UV (visible) light. Thus, direct optical switchable LC displays are investigated.

© 2013 OSA

OCIS Codes
(160.3710) Materials : Liquid crystals
(230.0230) Optical devices : Optical devices
(160.1585) Materials : Chiral media

ToC Category:
Optical Devices

Original Manuscript: July 15, 2013
Revised Manuscript: August 30, 2013
Manuscript Accepted: August 30, 2013
Published: September 9, 2013

Andy Ying-Guey Fuh, Zong-Han Wu, Ko-Ting Cheng, Cheng-Kai Liu, and Yuan-Di Chen, "Direct optical switching of bistable cholesteric textures in chiral azobenzene-doped liquid crystals," Opt. Express 21, 21840-21846 (2013)

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