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Title: Identifying the distinct phases of THz waves from K-valley electrons in graphite

The polarity change of THz electromagnetic waves radiated from single-crystalline graphite and polycrystalline graphite films has been studied to identify the main generation mechanism in conventional reflective THz time-domain spectroscopy scheme. The excitation wavelength variation around the K-valley produces no significant changes in THz field strength. We further found that THz waves become fully dispersed without polarity change in lateral detection geometry.
Authors:
; ;  [1] ;  [2]
  1. School of Info. and Comm., Gwangju Institute of Science and Technology, Gwangju 500-712 (Korea, Republic of)
  2. Institute of Physics and Applied physics, Yonsei University, Seoul 120-749 (Korea, Republic of)
Publication Date:
OSTI Identifier:
22261755
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 1566; Journal Issue: 1; Conference: ICPS 2012: 31. international conference on the physics of semiconductors, Zurich (Switzerland), 29 Jul - 3 Aug 2012; Other Information: (c) 2013 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; DETECTION; ELECTROMAGNETIC RADIATION; ELECTRONS; EXCITATION; FILMS; GRAPHITE; MONOCRYSTALS; POLYCRYSTALS; SPECTROSCOPY; WAVELENGTHS