Terahertz transmission and sheet conductivity of randomly stacked multi-layer graphene

Terahertz transmission and sheet conductivity of randomly stacked multi-layer graphene

We investigate transmission characteristics and sheet conductivity of mono- to multi-layer graphene deposited on quartz in the terahertz (THz) frequency region. The free carrier absorption and Fabry-Perot interference between graphene layers give rise to nonlinear decrease of THz transmission from 7...

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Veröffentlicht in:Applied physics letters 2013-05, Vol.102 (19)
Hauptverfasser: Baek, I. H., Ahn, K. J., Kang, B. J., Bae, S., Hong, B. H., Yeom, D.-I., Lee, K., Jeong, Y. U., Rotermund, F.
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container_issue 19
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container_title Applied physics letters
container_volume 102
creator Baek, I. H.
Ahn, K. J.
Kang, B. J.
Bae, S.
Hong, B. H.
Yeom, D.-I.
Lee, K.
Jeong, Y. U.
Rotermund, F.
description We investigate transmission characteristics and sheet conductivity of mono- to multi-layer graphene deposited on quartz in the terahertz (THz) frequency region. The free carrier absorption and Fabry-Perot interference between graphene layers give rise to nonlinear decrease of THz transmission from 76.7% to 27% for mono- to 12-layer graphene. These phenomena are well explained with a modified theoretical model based on Drude conductivity. The optical sheet conductivity of multi-layer graphene, made by layer-by-layer random stacking of high-quality mono-layer graphene, at 1 THz exhibits two orders of magnitude higher values than the universal optical conductivity due to intraband transition of intrinsic graphene.
doi_str_mv 10.1063/1.4805074
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title Terahertz transmission and sheet conductivity of randomly stacked multi-layer graphene
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