Experimental study of plasmon in a grating coupled graphene device with a resonant cavity

Experimental study of plasmon in a grating coupled graphene device with a resonant cavity

Plasmon was probed from graphene which was grown by chemical vapor deposition using terahertz time-domain spectroscopy at room temperature. Graphene was laid on a resonant cavity, and metal grating was then deposited on top of them. For the THz light polarized along the grid fingers, the optical con...

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Veröffentlicht in:Applied physics letters 2015-11, Vol.107 (19)
Hauptverfasser: Yan, Bo, Fang, Jingyue, Qin, Shiqiao, Liu, Yongtao, Zhou, Yingqiu, Li, Renbing, Zhang, Xue-Ao
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Applied physics
Chemical vapor deposition
Graphene
Organic chemistry
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container_issue 19
container_start_page
container_title Applied physics letters
container_volume 107
creator Yan, Bo
Fang, Jingyue
Qin, Shiqiao
Liu, Yongtao
Zhou, Yingqiu
Li, Renbing
Zhang, Xue-Ao
description Plasmon was probed from graphene which was grown by chemical vapor deposition using terahertz time-domain spectroscopy at room temperature. Graphene was laid on a resonant cavity, and metal grating was then deposited on top of them. For the THz light polarized along the grid fingers, the optical conductivity of graphene changed from Drude response into strongly Lorentz behavior with a peak formed in the THz-region. These experimental results are highly consistent with the theoretical prediction of a single layer graphene. It confirms that the graphene plasmon frequency can be tuned by the length of grating. Moreover, the extinction in the transmission of single-layer graphene can also be increased beyond 60%.
doi_str_mv 10.1063/1.4935344
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subjects Applied physics
Chemical vapor deposition
Graphene
Organic chemistry
title Experimental study of plasmon in a grating coupled graphene device with a resonant cavity
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