Electrically Switchable and Permanently Stable Light Scattering Modes by Dynamic Fingerprint Chiral Textures

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題名:	Electrically Switchable and Permanently Stable Light Scattering Modes by Dynamic Fingerprint Chiral Textures
作者:	劉鄭楷;Cheng, Ko-Ting;Lee, Po-Yi;Qasim, Malik M.;Liu, Cheng-Kai;Cheng, Wen-Fa;Wilkinson, Timothy D.
貢獻者:	理學院光電科學與工程學系
關鍵詞:	electric field;light scattering;liquid crystals
日期:	2016-04-27
上傳時間:	2026-04-23 11:28:25 (UTC+8)
出版者:	American Chemical Society;United States: American Chemical Society
摘要:	摘要： Negative dielectric nematic liquid crystals (LCs) doped with two azobenzene materials provide electrically switchable and permanently stable scattering mode light modulators based on dynamic fingerprint chiral textures (DFCT) with inhomogeneously helical axes. These light modulators can be switched between transparent (stable large domains of DFCT) states and scattering (stable small domains of DFCT) states by applying electric fields with different frequencies. The generation of DFCT results from the long flexible side chains of the doped chiral dopant. That is, if the DFCT can be obtained, then the large domains of DFCT reflect an intrinsically stable state. Moreover, the stabilization of the small domains of DFCT are caused by the terminal rigid restricted side chains of the other doped chiral dopant. Experimentally, the required amplitude to switch the light modulator from a scattering (transparent) state to a transparent (scattering) state decreases as the frequency of the applied electric field increases (decreases) within the set limits. This study is the first report on the advantages of the light scattering mode of DFCT, including low operating voltage, permanently stable transmission, wide viewing angle, high contrast, and polarization-independent scattering and transparency. 其他題名： ACS Appl. Mater. Interfaces 出版者： United States: American Chemical Society 出版日期： 2016-04-27 出處： ACS applied materials & interfaces, 2016-04, Vol.8 (16), p.10483-10493 資源來源： American Chemical Society Journals 版權： Copyright © 2016 American Chemical Society 識別號： ISSN: 1944-8244 識別號： ISSN: 1944-8252 識別號： EISSN: 1944-8252 識別號： DOI: 10.1021/acsami.5b12854 識別號： PMID: 27035635
顯示於類別:	[光電科學與工程學系] 期刊論文

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