Open AccessElectrically-controlled nonlinear terahertz optical properties of graphene
Author(s) -
Dong Hai-Ming
Publication year - 2013
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.62.237804
Subject(s) - terahertz radiation , electric field , graphene , nonlinear system , physics , terahertz spectroscopy and technology , condensed matter physics , materials science , field (mathematics) , optoelectronics , quantum mechanics , mathematics , pure mathematics
In this paper, we present a detailed theoretical study of nonlinear terahertz optical properties of graphene in the presence of electric field and terahertz radiation field. The optical current is computed and investigated on the basis of quantum theory and semi-classical Boltzmann equations. It shows a large nonlinear terahertz response and the nonlinearity becomes larger with increasing electric field or decreasing terahertz frequencies. Moreover, it is found that the optical nonlinearity can be modified and controlled by electric fields.