15 October 2004 Lasing characteristics of a dye-doped nematic liquid crystal layer sandwiched by two polymeric cholesteric liquid crystals
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Abstract
We have studied the lasing characteristics from a dye-doped nematic layer sandwiched by two polymeric cholesteric liquid crystal (PCLC) films as photonic band gap materials. The nematic layer possessing birefringence brings about the following remarkable optical characteristics; (1) reflectance in the photonic band gap (PBG) region exceeds 50% due to the retardation effect, being unpredictable from a single CLC film, (2) efficient lasing occurs either at the notch of PBG or at the photonic band edge, (3) the lasing emisions contain both right- and left-circular polarizations, and (4) tunable lasing can be achieved by the reorientation of nematic liquid crystal molecule under the application of an electric field.
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Myoung Hoon Song, Byoungchoo Park, Ki-Chul Shin, Takashi Ohta, Yuko Tsunoda, Hajime Hoshi, Yoichi Takanishi, Ken Ishikawa, Junji Watanabe, Suzushi Nishimura, Takehiro Toyooka, Zhengguo Zhu, Timothy M. Swager, Hideo Takezoe, "Lasing characteristics of a dye-doped nematic liquid crystal layer sandwiched by two polymeric cholesteric liquid crystals", Proc. SPIE 5518, Liquid Crystals VIII, (15 October 2004); doi: 10.1117/12.562626; https://doi.org/10.1117/12.562626
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