• 文献标题:   Generation of half-integer harmonics and efficient THz-to-visible frequency conversion in strained graphene
  • 文献类型:   Article
  • 作  者:   ORNIGOTTI M, ORNIGOTTI L, BIANCALANA F
  • 作者关键词:  
  • 出版物名称:   APL PHOTONICS
  • ISSN:   2378-0967
  • 通讯作者地址:  
  • 被引频次:   5
  • DOI:   10.1063/5.0049678
  • 出版年:   2021

▎ 摘  要

We study the generation of harmonics from graphene under the influence of an artificial magnetic field, generated via bending of a graphene flake. We show how the Landau level structure induced by the pseudomagnetic field breaks the centrosymmetry of graphene, thus allowing the generation of even harmonics. We also show that depending on the impinging pulse duration, the nonlinear signal does not only contain the integer harmonics of the impinging pulse but also its half-integer ones due to the peculiar square-root-like nature of Landau levels in graphene.