• 文献标题:   Electrically-controlled nonlinear terahertz optical properties of graphene
  • 文献类型:   Article
  • 作  者:   DONG HM
  • 作者关键词:   graphene, terahertz, nonlinear, current
  • 出版物名称:   ACTA PHYSICA SINICA
  • ISSN:   1000-3290
  • 通讯作者地址:   China Univ Mining Technol
  • 被引频次:   5
  • DOI:   10.7498/aps.62.237804
  • 出版年:   2013

▎ 摘  要

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.