• 文献标题:   Planar hyperlens based on a modulated graphene monolayer
  • 文献类型:   Article
  • 作  者:   FORATI E, HANSON GW, YAKOVLEV AB, ALU A
  • 作者关键词:  
  • 出版物名称:   PHYSICAL REVIEW B
  • ISSN:   2469-9950 EI 2469-9969
  • 通讯作者地址:   Univ Wisconsin
  • 被引频次:   32
  • DOI:   10.1103/PhysRevB.89.081410
  • 出版年:   2014

▎ 摘  要

The canalization of terahertz surface plasmon polaritons using a modulated graphene monolayer is investigated for subwavelength imaging. An anisotropic surface conductivity formed by a set of parallel nanoribbons with alternating positive and negative imaginary conductivities is used to realize the canalization regime required for hyperlensing. The ribbons are narrow compared to the wavelength and are created electronically by gating a graphene layer over a corrugated ground plane. Good quality canalization of surface plasmon polaritons is shown in the terahertz even in the presence of realistic loss in graphene, with relevant implications for subwavelength imaging applications.