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Please use this identifier to cite or link to this item: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/27630

Title: Optical Constants Of Two Typical Liquid Crystals 5CB And PCH5 In the THz Frequency Range
Authors: R.-P. Pan;T.-R. Tsai;C.-Y. Chen;C.-L. Pan
Contributors: NTOU:Institute of Optoelectronic Sciences
Keywords: 5CB;absorption;birefringence;liquid crystal;optical constants;PCH5;refractive index;THz;time-domain spectroscopy
Date: 2003-06
Issue Date: 2011-10-21T02:32:29Z
Publisher: Journal of Biological Physics (J. Biological Physics)
Abstract: Abstract:The complex refractive indices of two benchmark nematic liquid crystal,4-4 -n-pentyl-cyanobiphenyl (5CB) and 4-(trans-4pentylcyclohexyl)-benzonitrile (PCH5) have been determinedin the frequency range from 0.2 to 0.8 THz. The technique of coherent THztime-domain spectroscopy (THz-TDS) was used. We show that the birefringenceof 5CB is in the range of 0.15 to 0.21, while that of PCH is from 0.01 to0.08. Both liquid crystals exhibit relatively small absorption in thisfrequency range. The large birefringence of 5CB indicates possible applications of liquid-crystal-based devices for modulation and polarizationcontrol of electromagnetic radiation in the THz frequency range.
Relation: 29(2-3), pp.335-338
URI: http://ntour.ntou.edu.tw/handle/987654321/27630
Appears in Collections:[光電科學研究所] 期刊論文

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