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Title: Graphene on nanoscale gratings for the generation of terahertz Smith-Purcell radiation

Generation of THz radiation based on the Smith-Purcell effect in graphene is investigated numerically. The specific device geometry considered involves an electrically biased single-layer sheet of graphene deposited on a periodic array of holes in a solid substrate. Rigorous electrodynamic simulations combined with a basic model of charge transport are presented, showing that technologically significant output power levels can be obtained at geometrically tunable THz frequencies. These results suggest that graphene is a uniquely suited materials platform for the demonstration of THz electron-beam radiation mechanisms in compact solid-state systems.
Authors:
; ; ;  [1]
  1. Department of Electrical and Computer Engineering and Photonics Center, Boston University, 8 Saint Mary's Street, Boston, Massachusetts 02215 (United States)
Publication Date:
OSTI Identifier:
22395513
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 105; Journal Issue: 24; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; CHARGE TRANSPORT; ELECTRODYNAMICS; ELECTRON BEAMS; GRAPHENE; GRATINGS; HOLES; NANOSTRUCTURES; NUMERICAL ANALYSIS; PERIODICITY; SHEETS; SOLIDS; SUBSTRATES; THZ RANGE