• 文献标题:   Harnessing ultraconfined graphene plasmons to probe the electrodynamics of superconductors
  • 文献类型:   Article
  • 作  者:   COSTA AT, GONCALVES PAD, BASOV DN, KOPPENS FHL, MORTENSEN NA, PERES NMR
  • 作者关键词:   plasmon, polariton, graphene, superconductivity, nearfield microscopy
  • 出版物名称:   PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
  • ISSN:   0027-8424
  • 通讯作者地址:  
  • 被引频次:   9
  • DOI:   10.1073/pnas.2012847118
  • 出版年:   2021

▎ 摘  要

We show that the Higgs mode of a superconductor, which is usually challenging to observe by far-field optics, can be made clearly visible using near-field optics by harnessing ultraconfined graphene plasmons. As near-field sources we investigate two examples: graphene plasmons and quantum emitters. In both cases the coupling to the Higgs mode is clearly visible. In the case of the graphene plasmons, the coupling is signaled by a clear anticrossing stemming from the interaction of graphene plasmons with the Higgs mode of the superconductor. In the case of the quantum emitters, the Higgs mode is observable through the Purcell effect. When combining the superconductor, graphene, and the quantum emitters, a number of experimental knobs become available for unveiling and studying the electrodynamics of superconductors.