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Terahertz photoconductivity and plasmon modes in double-quantum-well field-effect transistors

  • X. G. Peralta
  • , S. J. Allen
  • , M. C. Wanke
  • , N. E. Harff
  • , J. A. Simmons
  • , M. P. Lilly
  • , J. L. Reno
  • , P. J. Burke
  • , J. P. Eisenstein

Research output: Contribution to journalArticlepeer-review

314 Scopus citations

Abstract

Double-quantum-well field-effect transistors with a grating gate exhibit a sharply resonant, voltage tuned terahertz photoconductivity. The voltage tuned resonance is determined by the plasma oscillations of the composite structure. The resonant photoconductivity requires a double-quantum well but the mechanism whereby plasma oscillations produce changes in device conductance is not understood. The phenomenon is potentially important for fast, tunable terahertz detectors. © 2002 American Institute of Physics.
Original languageEnglish
Pages (from-to)1627-1629
Number of pages3
JournalApplied Physics Letters
Volume81
Issue number9
DOIs
StatePublished - Aug 26 2002
Externally publishedYes

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