Corpus ID: 235458404

Gate-tunable Veselago Interference in a Bipolar Graphene Microcavity

  title={Gate-tunable Veselago Interference in a Bipolar Graphene Microcavity},
  author={Xi Zhang and Wei Ren and Elliot Bell and Ziyan Zhu and Kenji Watanabe and Takashi Taniguchi and Efthimios Kaxiras and Mitchell Luskin and Ke Wang},
The relativistic charge carriers in monolayer graphene can be manipulated in manners akin to conventional optics (electron-optics): angle-dependent Klein tunneling collimates an electron beam (analogous to a laser), while a Veselago refraction process focuses it (analogous to an optical lens). Both processes have been previously investigated, but the collimation and focusing efficiency have been reported to be relatively low even in state-of-the-art ballistic pn-junction devices. These… Expand
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