Enhancement of photonic density of states in finite graphene multilayers

Ashley M. DaSilva, You-Chia Chang, Ted Norris, and Allan H. MacDonald
Phys. Rev. B 88, 195411 – Published 13 November 2013

Abstract

We consider the optical properties of finite systems composed of a series of graphene sheets separated by thin dielectric layers. Because these systems respond as conductors to electric fields in the plane of the graphene sheets and as insulators to perpendicular electric fields, they can be expected to have properties similar to those of hyperbolic metamaterials. We show that under typical experimental conditions graphene/dielectric multilayers have enhanced Purcell factors, and enhanced photonic densities of states in both the terahertz (THz) and midinfrared (mid-IR) frequency range. These behaviors can be traced to the coupled plasmon modes of the multilayer graphene system. We show that these results can be obtained with just a few layers of graphene.

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  • Received 24 July 2013

DOI:https://doi.org/10.1103/PhysRevB.88.195411

©2013 American Physical Society

Authors & Affiliations

Ashley M. DaSilva1, You-Chia Chang2,3, Ted Norris3,4, and Allan H. MacDonald1

  • 1Department of Physics, The University of Texas at Austin, Austin, Texas 78712-1192, USA
  • 2Applied Physics Program, The University of Michigan, Ann Arbor, Michigan 48109, USA
  • 3Center for Ultrafast Optical Science, The University of Michigan, Ann Arbor, Michigan 48109, USA
  • 4Department of Electrical Engineering and Computer Science, The University of Michigan, Ann Arbor, Michigan 48109, USA

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Issue

Vol. 88, Iss. 19 — 15 November 2013

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