Cholesteric liquid crystal laser with wide tuning capability

Cholesteric liquid crystal laser with wide tuning capability

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 . Tuni...

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Veröffentlicht in:Applied physics letters 2005-04, Vol.86 (16), p.161120-161120-3
Hauptverfasser: Lin, Tsung-Hsien, Chen, Yi-Jan, Wu, Chun-Hui, Fuh, Andy Y.-G., Liu, J.-H., Yang, P.-C.
Format: Artikel
Sprache:eng
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Zusammenfassung: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.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.1897439