Experimental demonstration of ultra-wideband and high-efficiency   terahertz spoof surface plasmon polaritons coupler

doi:10.1063/1.4948928

CORC > 北京大学 > 信息科学技术学院

	Experimental demonstration of ultra-wideband and high-efficiency terahertz spoof surface plasmon polaritons coupler
	Tang, Heng-He ; Ma, Tian-Jun ; Liu, Pu-Kun
刊名	APPLIED PHYSICS LETTERS
	2016
关键词	BROAD-BAND WAVES
DOI	10.1063/1.4948928
英文摘要	Spoof surface plasmon polaritons (SSPPs) are promising for subwavelength waveguiding in the terahertz (THz) frequency range. However, they cannot be efficiently excited from spatial propagating or guided waves due to the mismatched momenta. In this paper, a THz coupler is designed to smoothly bridge SSPPs and guided (or propagating) waves. By using a tapered parallel-plate waveguide, the incident energies are efficiently compressed and coupled into a subwavelength gap. Then, the momenta differences are mitigated with a graded grating. The numerical simulations show that the relative bandwidth of the coupler reaches up to 127%, and the maximum coupling efficiency is 99%. More importantly, experiment results in the 0.22THz-0.33THz frequency range are also presented to verify the good performance of the coupler. The work provides a technical support for terahertz waveguiding. Published by AIP Publishing.; National Natural Science Foundation of China [61531002, 61471007, 11575015]; China Postdoctoral Science Foundation [2014M560019]; SCI(E); EI; ARTICLE; pkliu@pku.edu.cn; 19; 108
语种	中文
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/437274]
专题	信息科学技术学院
推荐引用方式 GB/T 7714	Tang, Heng-He,Ma, Tian-Jun,Liu, Pu-Kun. Experimental demonstration of ultra-wideband and high-efficiency terahertz spoof surface plasmon polaritons coupler[J]. APPLIED PHYSICS LETTERS,2016.
APA	Tang, Heng-He,Ma, Tian-Jun,&Liu, Pu-Kun.(2016).Experimental demonstration of ultra-wideband and high-efficiency terahertz spoof surface plasmon polaritons coupler.APPLIED PHYSICS LETTERS.
MLA	Tang, Heng-He,et al."Experimental demonstration of ultra-wideband and high-efficiency terahertz spoof surface plasmon polaritons coupler".APPLIED PHYSICS LETTERS (2016).