Photo-excited carriers and optical conductance and transmission in graphene in the presence of phonon scattering

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	Photo-excited carriers and optical conductance and transmission in graphene in the presence of phonon scattering
	Dong, HM ; Xu, W ; Zhang, J ; Peeters, FM ; Vasilopoulos, P
刊名	PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES
	2010
卷号	42 期号:4 页码:748
ISSN号	1386-9477
通讯作者	Xu, W (reprint author), Chinese Acad Sci, Key Lab Mat Phys, Inst Solid State Phys, Beijing 100864, Peoples R China.
中文摘要	We present a theoretical study of the optoelectronic properties of monolayer graphene. Including the effect of the electron-photon-phonon scattering, we employ the mass- and energy-balance equations derived from the Boltzmann equation to evaluate self-consistently the carrier densities, optical conductance and transmission coefficient in graphene in the presence of linearly polarized radiation field. We find that the photo-excited carrier density can be increased under infrared radiation and depend strongly on radiation intensity and frequency. For short wavelengths (lambda <3 mu m), the universal optical conductance sigma(0) = e(2)/4h is obtained and the light transmittance is about 0.97-0.98. Interestingly, there is an optical absorption window in the range 4-100 mu m which is induced by different transition energies required for inter- and intra-band optical absorption. The position and width of this absorption window depend sensitively on temperature and carrier density of the system. These results are relevant for applications of recently developed graphene devices in advanced optoelectronics such as the infrared photodetectors. Crown Copyright (C) 2009 Published by Elsevier B.V. All rights reserved.
收录类别	SCI
语种	英语
公开日期	2013-09-24
内容类型	期刊论文
源URL	[http://ir.iphy.ac.cn/handle/311004/50918]
专题	物理研究所_物理所公开发表论文_物理所公开发表论文_期刊论文
推荐引用方式 GB/T 7714	Dong, HM,Xu, W,Zhang, J,et al. Photo-excited carriers and optical conductance and transmission in graphene in the presence of phonon scattering[J]. PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES,2010,42(4):748.
APA	Dong, HM,Xu, W,Zhang, J,Peeters, FM,&Vasilopoulos, P.(2010).Photo-excited carriers and optical conductance and transmission in graphene in the presence of phonon scattering.PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES,42(4),748.
MLA	Dong, HM,et al."Photo-excited carriers and optical conductance and transmission in graphene in the presence of phonon scattering".PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES 42.4(2010):748.