title: Multi-wavelength laser emission in dye-doped photonic liquid crystals.
abstract: Multi-wavelength lasing in a dye-doped cholesteric liquid crystal (CLC) cell is demonstrated. By adding oversaturated chiral dopant, the multi-photonic band CLC structure can be obtained with non-uniform chiral solubility. Under appropriate excitation, multi-wavelength lasing can be achieved with a multi-photonic band edge CLC structure. The number of lasing wavelengths can be controlled under various temperature processes. Nine wavelength CLC lasings were observed simultaneously. The wavelength range covers around 600-675nm. Furthermore, reversible tuning of multi-wavelength lasing was achieved by controlling CLC device temperature.
authors.affiliation: Department of Photonics, Institute of Electro-Optical Engineering, National Sun Yat-Sen University, Kaohsiung, Taiwan.
authors.forename: Chun-Ta
authors.initials: CT
authors.lastname: Wang
authors.forename: Tsung-Hsien
authors.initials: TH
authors.lastname: Lin