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High Q defect mode and laser action in one-dimensional hybrid photonic crystal containing cholesteric liquid crystal

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4 Author(s)
Matsuhisa, Yuko ; Department of Electrical, Electronic and Information Engineering, Graduate School of Engineering, Osaka University, 2-1 Yamada-oka, Suita, Osaka 565-0871, Japan ; Ozaki, Ryotaro ; Yoshino, Katsumi ; Ozaki, Masanori

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The authors have investigated the optical characteristics of a one-dimensional hybrid photonic crystal (1D HPC) containing cholesteric liquid crystal (CLC) as a defect by theoretical calculation and predicted the appearance of additional modes at the band edges of the CLC defect, whose Q factor was higher than those of the other defect modes. They have confirmed the appearance of the additional mode experimentally. Single-mode laser action with low pumping threshold was observed in a 1D HPC with a dye-doped CLC defect, which is based on the additional defect mode with a high Q factor peculiar to the CLC defect having periodic structure.

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Applied Physics Letters  (Volume:89 ,  Issue: 10 )