Cholesteric liquid crystal laser with wide tuning capability

Tsung Hsien Lin, Yi Jan Chen, Chun Hui Wu, Andy Y.G. Fuh, J. H. Liu, P. C. Yang

Research output: Contribution to journalArticlepeer-review

104 Citations (Scopus)


This letter examines a planar cholesteric cell (CLC) doped with two collocated laser dyes as a one-dimensional photonic crystal. Adding phototunable chiral material (AzoB) allows the CLC photonic crystal to be lased at the band edges of the photonic band gap with a tuning range of over 100 nm. Tuning is performed by irradiating the chiral AzoB material with UV light, causing the material to undergo trans-cis isomerization in the CLC film. The tuning range is the visible region from 563 to 667 nm. Moreover, the tuning is reversible.

Original languageEnglish
Article number161120
Pages (from-to)1-3
Number of pages3
JournalApplied Physics Letters
Issue number16
Publication statusPublished - 2005 Apr 18

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)


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