Coherent submillimeter-wave emission from non-equilibrium two-dimensional free carrier plasmas in AlGaAs/GaAs heterojunctions

K. Hirakawa*, I. Wilke, K. Yamanaka, H. G. Roskos, M. Voßebürger, F. Wolter, C. Waschke, H. Kurz, M. Grayson, B. C. Tsui

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

10 Scopus citations

Abstract

We have investigated the coherent submillimeter-wave radiation from non-equilibrium plasma oscillations in AlGaAs/GaAs heterojunctions by time-resolved terahertz (THz) emission spectroscopy. The observed decay rate of optically excited plasma oscillations is found to be much shorter than the momentum relaxation time, suggesting that non-equilibrium hot two-dimensional plasmon modes relax via strong carrier-carrier interactions.

Original languageEnglish (US)
Pages (from-to)368-371
Number of pages4
JournalSurface Science
Volume361-362
DOIs
StatePublished - Jul 20 1996

Keywords

  • Electrical transport
  • Gallium arsenide
  • Heterojunctions
  • Semiconductor-semiconductor heterostructures

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films
  • Materials Chemistry

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