Optical response of tunable terahertz plasmon in a grating-gated graphene transistor

doi:10.1088/1674-1056/26/9/097802

Abstract Tunable terahertz plasmon in a graphene-based device with a grating serving as a top gate is studied. Transmission spectra exhibit a distinct peak in the terahertz region when the terahertz electric field is perpendicular to the grating fingers. Our results show that the extinction in the transmission of single-layer graphene shields beyond 80%. Electronic results further show that the graphene plasmon can be weakly adjusted by tuning the gate voltage. Theoretical calculation also implies that the plasmon frequency of graphene can fall into the terahertz region of 1-2 THz by improving the sustaining ability and capacitance of the top gate.

Keywords: graphene plasmon Lorentz terahertz time-domain spectroscopy electrical measurement

Received: 17 April 2017
Revised: 10 June 2017
Accepted manuscript online:

PACS:	78.67.Wj	(Optical properties of graphene)
	87.50.U	(Millimeter/terahertz fields effects)
	72.80.Vp	(Electronic transport in graphene)
	52.40.-w	(Plasma interactions (nonlaser))

Fund: Project supported by the National Natural Science Foundation of China (Grant No. 11272337), the Research Project of National University of Defense Technology, China (Grant No. ZK16-03-34), the Natural Science Foundation of Hunan Province, China (Grant No. 2016JJ3021), and the Open Project of Key Laboratory of Nanodevices and Applications, Suzhou Institute of Nano-tech and Nano-bionics, Chinese Academy of Sciences (Grant No. 15ZS03).

Corresponding Authors: Jingyue Fang
E-mail: fjynudt@aliyun.com

Cite this article:

Bo Yan(闫博), Jingyue Fang(方靖岳), Shiqiao Qin(秦石乔), Yongtao Liu(刘永涛), Li Chen(陈力), Shuang Chen(陈爽), Renbing Li(李仁兵), Zhen Han(韩震) Optical response of tunable terahertz plasmon in a grating-gated graphene transistor 2017 Chin. Phys. B 26 097802

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Optical response of tunable terahertz plasmon in a grating-gated graphene transistor

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