• 文献标题:   Terahertz generation and amplification in graphene nanoribbons in multi-frequency electric fields
  • 文献类型:   Article
  • 作  者:   MUSAH R, MENSAH SY, ABUKARI SS
  • 作者关键词:   graphene, current density, bessel function, terahertz
  • 出版物名称:   PHYSICA ELOWDIMENSIONAL SYSTEMS NANOSTRUCTURES
  • ISSN:   1386-9477 EI 1873-1759
  • 通讯作者地址:   Univ Dev Studies
  • 被引频次:   0
  • DOI:   10.1016/j.physe.2014.03.006
  • 出版年:   2014

▎ 摘  要

We study theoretically a multi-frequency response of electrons in confined graphene subject to DC-AC driven fields. We explore the possibility for using graphene nanoribbons (GNRs) to generate and amplify terahertz (THz) radiations in electric field clomainless regime. We discover two main important schemes of generation; when the frequencies are commensurate, THz generation is due to wave mixing and when they are non-commensurate, a single strong field suppresses space charge instability and any weak signals can get amplified. (C) 2014 Elsevier B.V. All rights reserved