• 文献标题:   Bidirectional residual current in monolayer graphene under few-cycle laser irradiation
  • 文献类型:   Article
  • 作  者:   ZHANG XX, WU ER, DU HL, GUO HC, LIU CP
  • 作者关键词:  
  • 出版物名称:   OPTICS EXPRESS
  • ISSN:   1094-4087
  • 通讯作者地址:  
  • 被引频次:   0
  • DOI:   10.1364/OE.470124
  • 出版年:   2022

▎ 摘  要

By numerically solving the time-dependent Schrodinger equation and semiconductor Bloch equations, the light-induced residual current in monolayer graphene driven by a circularly polarized few-cycle laser is investigated. An evident current direction reversal is disclosed when the amplitude of the driving electric field exceeds a certain threshold value, which is absent in recent investigation [Nature 550, 224 (2017)]. Here the internal physical mechanism for the current reversal is inter-optical-cycle interference under a suitable long laser wavelength. Moreover, the reversal-related laser field amplitude depends sensitively on the ratio of ponderomotive energy to photon energy.(c) 2022 Optica Publishing Group under the terms of the Optica Open Access Publishing Agreement