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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 18, Iss. 16 — Aug. 2, 2010
  • pp: 17498–17503

Optically-tunable beam steering grating based on azobenzene doped cholesteric liquid crystal

Hung-Chang Jau, Tsung-Hsien Lin, Ri-Xin Fung, San-Yi Huang, J.-H. Liu, and Andy Y.-G. Fuh  »View Author Affiliations

Optics Express, Vol. 18, Issue 16, pp. 17498-17503 (2010)

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This work proposes an optically controllable beam-steering device, fabricated using cholesteric liquid crystals (CLCs) that are doped with azobenzene. The trans-cis photoisomerization of azobenzene changes the pitch of the CLC fingerprint structure and shifts the diffraction angle. The diffraction angle increases when the cell is irradiated with UV light, and restored when it is irradiated with green light. Combining the photoisomerization effect with electrical effect, the CLC beam-steering device provides a steering angle of ~19°.The tuning is continuous and could be completed within a few seconds.

© 2010 OSA

OCIS Codes
(050.1950) Diffraction and gratings : Diffraction gratings
(160.3710) Materials : Liquid crystals

ToC Category:
Diffraction and Gratings

Original Manuscript: May 27, 2010
Revised Manuscript: July 21, 2010
Manuscript Accepted: July 26, 2010
Published: July 30, 2010

Hung-Chang Jau, Tsung-Hsien Lin, Ri-Xin Fung, San-Yi Huang, J.-H. Liu, and Andy Y.-G. Fuh, "Optically-tunable beam steering grating based on azobenzene doped cholesteric liquid crystal," Opt. Express 18, 17498-17503 (2010)

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