Anomalous Photon-Assisted Tunneling in Graphene

Abstract

We investigated the transmission of Dirac electrons through a potential barrier in the presence of circularly polarized light. An anomalous photon-assisted enhanced transmission is predicted and explained. It is demonstrated that the perfect transmission for nearly head-on collision in infinite graphene is suppressed in gapped dressed states of electrons, which is further accompanied by a shift of peaks as a function of the incident angle away from head-on collision. In addition, the perfect transmission is partially suppressed by a photon-induced gap in illuminated graphene. After the effect of rough edges of the potential barrier or impurity scattering is included, the perfect transmission with no potential barrier becomes completely suppressed and the energy range for the photon-assisted transmission is reduced at the same time.

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Document Details

Document Type
Technical Report
Publication Date
Jan 01, 2012
Accession Number
ADA553695

Entities

People

  • Andrii Iurov
  • Danhong Huang
  • Godfrey Gumbs
  • Oleksiy
  • Roslyak

Organizations

  • Air Force Research Laboratory

Tags

Communities of Interest

  • Advanced Electronics

DTIC Thesaurus Topics

  • Air Force
  • Air Force Research Laboratories
  • Amplitude
  • Angle Of Incidence
  • Band Structures
  • Boundaries
  • Collisions
  • Electron Energy
  • Electrons
  • Energy Bands
  • Energy Gaps
  • Equations
  • Graphene
  • Probability
  • Quantum Tunneling
  • Subatomic Particles
  • Tunneling

Fields of Study

  • Physics

Readers

  • International Journalism and Media Studies.
  • Quantum spin resonance or Electron Paramagnetic Resonance spectroscopy.
  • Radar Systems Engineering.

Technology Areas

  • Microelectronics
  • Microelectronics - Graphene