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題名: Second Harmonic Generation Studies of Polymer-Stabilized Cholesteric Texture Films
作者: Fuh, Andy Ying-Guey;Huang, Chi-Yen;Lau, Cheuk-Wah
貢獻者: 光電科技研究所
關鍵詞: Cholesteric liquid crystal;Second harmonic generation;Polymer network;Dielectric gradient;Focal conic
日期: 1997-05
上傳時間: 2013-01-07T02:09:51Z
出版者: The Japan Society of Applied Physics
摘要: Using a mode-locking Nd:YAG laser, we measured the second harmonic generation (SHG) of polymer-stabilized cholesteric texture (PSCT) films. The SHG observed in these samples is due to the dielectric gradient which arises from the interfaces between the cholesteric liquid crystal/polymer and those between the adjacent cholesteric focal conic domains having a different helical axis. Both the SHG intensities and the electro-optical characteristics of PSCT films were measured as a function of the polymer concentration. In addition, polymer network structures formed in PSCT films were investigated. Good correlations among the SHG measurements, electro-optical characteristics, and the polymer network morphologies were found. This means that SHG measurements could provide us with another qualitative, nondestructive method to analyze the PSCT films.
關聯: Jpn. J. Appl. Phys., 36(5A): 2754-2759
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