標題: Control of enhanced THz transmission through metallic hole arrays using nematic liquid crystal
作者: Pan, CL
Hsieh, CF
Pan, RP
Tanaka, M
Miyamaru, F
Tani, M
Hangyo, M
電子物理學系
光電工程學系
Department of Electrophysics
Department of Photonics
公開日期: 30-五月-2005
摘要: We demonstrate frequency tuning of enhanced THz radiation transmitted through a two- dimensional metallic hole array ( 2D- MHA) by controlling the index of refraction of the medium filling the holes and adjacent to the 2D- MHA on one side. The medium is a nematic liquid crystal ( NLC) and its index of refraction is varied using magnetically controlled birefringence of the NLC. With the NLC, the peak transmission frequency of the 2D- MHA shift to the red by 0.112 THz and can be tuned from 0.193 to 0.188 THz. The peak transmittance is as high as 70% or an enhancement of 2.42 times, considering the porosity of the 2D- MHA. As a tunable THz filter, this device exhibits a continuous tuning range of 4.7 GHz, a low insertion loss of 2.35 to 1.55 dB and a quality factor of similar to 4- 5. (C) 2005 Optical Society of America.
URI: http://dx.doi.org/10.1364/OPEX.13.003921
http://hdl.handle.net/11536/13695
ISSN: 1094-4087
DOI: 10.1364/OPEX.13.003921
期刊: OPTICS EXPRESS
Volume: 13
Issue: 11
起始頁: 3921
結束頁: 3930
顯示於類別:期刊論文


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