Department of Physics and Astronomy

University of Mississippi

Events

Event Information:

  • Tue
    10
    Oct
    2017

    Colloquium: Recent Developments on Graphene and Graphene Periodic Surfaces at Microwave and Terahertz Frequencies

    4:00 pmLewis 101

    Alex Yakovlev
    Department of Electrical Engineering
    University of Mississippi

    Recent Developments on Graphene and Graphene Periodic Surfaces at Microwave and Terahertz Frequencies

    Graphene, the first 2D material to be practically realized, has attracted great interest in the last decade. The fact that electrons in graphene behave as massless Dirac fermions leads to a variety of anomalous properties, such as charge carriers with ultra-high-mobility and long mean-free paths. Graphene's electrical properties are often represented by a local complex surface conductivity given by the Kubo formula. Since its surface conductivity leads to attractive surface plasmon properties, graphene has become a good candidate for plasmonic applications, especially in the terahertz regime.

    In this talk we will briefly discuss electrical, thermal, and mechanical properties of graphene, and will focus on the interaction of electromagnetic waves with graphene and graphene periodic surfaces at microwave and terahertz frequencies. Specifically, we will discuss the enhanced transmission with a graphene-dielectric stack, dual capacitive/inductive nature of graphene periodic surfaces, high-impedance surfaces with graphene patches, excitation of surface plasmon polaritons on graphene, planar hyperlens based on a modulated graphene, subwavelength imaging with graphene loaded wire media, and cloaking with graphene for antenna applications.