• 文献标题:   Dirac fermions in asymmetric graphene in electromagnetic field
  • 文献类型:   Article
  • 作  者:   MISHRA KA, KUMAR V
  • 作者关键词:   asymmetric graphene, floquet theory, rabi oscillation, collapserevival phenomenon, blochseigert shift, pumpprobe experiment
  • 出版物名称:   OPTICAL QUANTUM ELECTRONICS
  • ISSN:   0306-8919 EI 1572-817X
  • 通讯作者地址:   Manipal Univ Jaipur
  • 被引频次:   0
  • DOI:   10.1007/s11082-020-02374-w
  • 出版年:   2020

▎ 摘  要

It is well-known that the asymmetry has dramatic effects on the properties of graphene. Therefore, here, a systematic study is presented to describe the effect of asymmetry on the Floquet oscillations in graphene. Even in the absence of external electromagnetic field, some kind of oscillations is predicted due to asymmetry. In pump-probe spectra, it is found that the amplitude of Floquet oscillations decreases in the presence of asymmetry in the graphene, however, the frequency of these oscillations increases. Moreover, the collapse and revival times are affected significantly due to asymmetry in graphene. The Bloch-Siegert shift is studied in the perspective of Floquet oscillation, called Floquet-Bloch-Siegert shift. A numerical simulation is performed to justify the role of asymmetry on Floquet oscillation in graphene.