title: Lasing in chiral photonic liquid crystals and associated frequency tuning.
abstract: This letter addresses a dye-doped planar cholesteric cell as a one-dimensional photonic crystal, which can be lased at the band edges of the photonic band gap. The effect of the composition of the material and the thickness of a cholesteric cell (CLC) on the lasing action, and the photo-control of the lasing frequency, are experimentally investigated. Adding a tunable chiral monomer (TCM) allows the CLC's reflection band to be tuned by varying the intensity and/or exposure time of the UV curing light, enabling the lasing frequency of the CLC sample to be tuned.
authors.forename: Andy
authors.initials: A
authors.lastname: Fuh
authors.forename: Tsung-Hsien
authors.initials: TH
authors.lastname: Lin
authors.forename: J-H
authors.initials: JH
authors.lastname: Liu
authors.forename: F-C
authors.initials: FC
authors.lastname: Wu