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

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 transmissio...

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Published inChinese physics B Vol. 26; no. 9; pp. 454 - 458
Main Author 闫博 方靖岳 秦石乔 刘永涛 陈力 陈爽 李仁兵 韩震
Format Journal Article
LanguageEnglish
Published 01.08.2017
Subjects
光学响应
光栅调谐
太赫兹
晶体管
栅极电压
石墨
等离子体频率
门控
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ISSN1674-1056
2058-3834
DOI10.1088/1674-1056/26/9/097802

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Summary: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.
Bibliography:11-5639/O4
graphene plasmon Lorentz terahertz time-domain spectroscopy electrical measurement
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.
ISSN:1674-1056
2058-3834
DOI:10.1088/1674-1056/26/9/097802