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

Hung Chang Jau, Tsung Hsien Lin, Ri Xin Fung, San Yi Huang, J. H. Liu, Andy Y.G. Fuh

Research output: Contribution to journalArticlepeer-review

30 Citations (Scopus)

Abstract

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.

Original languageEnglish
Pages (from-to)17498-17503
Number of pages6
JournalOptics Express
Volume18
Issue number16
DOIs
Publication statusPublished - 2010 Aug 2

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics

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