Electrically controllable terahertz metamaterials with large tunabilities and low operating electric fields using electrowetting-on-dielectric cells

doi:10.1364/OL.444842

中山醫學大學機構典藏 CSMUIR > 中山醫學大學研究成果 > 期刊論文 > Item 310902500/23892

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题名:	Electrically controllable terahertz metamaterials with large tunabilities and low operating electric fields using electrowetting-on-dielectric cells
作者:	Silalahi, HM;Shih, YH;Lin, SH;Chen, YT;Wei, WY;Chao, PL;Huang, CY
日期:	2021
上传时间:	2022-08-05T09:44:33Z (UTC)
出版者:	OPTICAL SOC AMER
ISSN:	0146-9592
摘要:	A simple method that is compatible with all geometrical structures of terahertz (THz) metamaterials for increasing their frequency tunabilities and decreasing their operating electric fields is proposed. This method uses the displacement of glycerol droplets with various volumes to tune the resonance frequency of a THz metamaterial in an electrowetting-on-dielectric (EWOD) cell. The experimental results reveal that the THz metamaterial has a large frequency tunability of 28% at an operating electric field that is smaller than 0.2 V/mu m as the glycerol droplets move in and out of the path of a THz beam. The frequency tunability is large because the near field of the metamaterial experiences a large difference between the refractive indices of glycerol and air. The EWOD cell with the THz metamaterial is a great achievement for developing electrically controllable band-stop filters with large frequency tunabilities and small operating electric fields. (C) 2021 Optica Publishing Group.
URI:	http://dx.doi.org/10.1364/OL.444842 https://www.webofscience.com/wos/woscc/full-record/WOS:000722896900046 https://ir.csmu.edu.tw:8080/handle/310902500/23892
關聯:	OPTICS LETTERS ,2021,v46,issue 23, P5962-5965
显示于类别:	[中山醫學大學研究成果] 期刊論文

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