Measurement of the optical absorption spectra of epitaxial graphene from terahertz to visible

被引：449

作者：

Dawlaty, Jahan M. ^{[1
]}

Shivaraman, Shriram ^{[1
]}

Strait, Jared ^{[1
]}

George, Paul ^{[1
]}

Chandrashekhar, Mvs ^{[1
]}

Rana, Farhan ^{[1
]}

Spencer, Michael G. ^{[1
]}

Veksler, Dmitry ^{[2
]}

Chen, Yunqing ^{[2
]}

机构：

[1] Cornell Univ, Sch Elect & Comp Engn, Ithaca, NY 14853 USA

[2] Rensselaer Polytech Inst, Ctr Terahertz Res, Troy, NY 12180 USA

来源：

APPLIED PHYSICS LETTERS | 2008年 / 93卷 / 13期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1063/1.2990753

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We present experimental results on the optical absorption spectra of epitaxial graphene from the visible to the terahertz frequency range. In the terahertz range, the absorption is dominated by intraband processes with a frequency dependence similar to the Drude model. In the near-IR range, the absorption is due to interband processes and the measured optical conductivity is close to the theoretical value of e(2)/4h. We extract values for the carrier densities, the number of carbon atom layers, and the intraband scattering times from the measurements. (C) 2008 American Institute of Physics.

引用

页数：3

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