Cholesteric liquid crystal laser with wide tuning capability

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Abstract

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. © 2005 American Institute of Physics.

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Lin, T. H., Chen, Y. J., Wu, C. H., Fuh, A. Y. G., Liu, J. H., & Yang, P. C. (2005). Cholesteric liquid crystal laser with wide tuning capability. Applied Physics Letters, 86(16), 1–3. https://doi.org/10.1063/1.1897439

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