Tunable photonic band gap based on chiral liquid crystals having spiral periodic structure and laser action

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  • OZAKI Masanori
    Department of Electrical, Electronic and Information Engineering, Osaka University

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  • らせん周期構造を有するカイラル液晶のフォトニックバンド制御とレーザー発振
  • ラセン シュウキ コウゾウ オ ユウスル カイラル エキショウ ノ フォトニックバンド セイギョ ト レーザー ハッシン

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Abstract

<p>Chiral liquid crystals such as cholesteric liquid crystal and chiral smectic liquid crystal form a spiral molecular alignment whose periodicity can be tuned upon molecular design in a large range between 100 nm and several hundreds of micrometers. Recently, studies have been carried out on photonic band gap materials based on chiral liquid crystals forming spiral periodic structures with a periodicity of the order of optical wavelengths. In this report, 1-D photonic band characteristics in cholesteric liquid crystal, ferroelectric liquid crystal (chiral smectic liquid crystal) and polymerized cholesteric liquid crystal are reviewed and laser actions in these systems are described. The photonic defect structure and optical localized state characteristic of the spiral periodic structure are also discussed.</p>

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  • Oyo Buturi

    Oyo Buturi 75 (12), 1445-1452, 2006-12-10

    The Japan Society of Applied Physics

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