Ultrafast, Ultra-Broadband Superlattice Detector for THz Radiation

Abstract

We report on a novel detector for THz radiation. It consists of a GaAs/AlAs superlattice mesa device mounted in a corner cube antenna system. The detector shows a current-voltage characteristic with a negative differential conductance. Under the influence of THz radiation, the dc current through the superlattice mesa is reduced; this is caused by a THz field-induced modulation of Bloch oscillating miniband electrons in the superlattice. A fast detector response (several tenth of picoseconds, limited by the electronics) and a high responsivity is demonstrated in a frequency range 0.7-7 THz.

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Document Details

Document Type
Technical Report
Publication Date
Sep 29, 2000
Accession Number
ADP011747

Entities

People

  • A. A. Ignatov
  • E. Schomburg
  • F. Klappenberger
  • K. F. Renk
  • M. Kraetschmer

Organizations

  • University of Regensburg

Tags

Communities of Interest

  • Advanced Electronics

DTIC Thesaurus Topics

  • Backward Wave Oscillators
  • Broadband
  • Detectors
  • Direct Current
  • Electronics
  • Electrons
  • Free Electron Lasers
  • Free Electrons
  • Frequency
  • Lasers
  • Metal-Semiconductor Junctions
  • Radiation
  • Relaxation Time
  • Schottky Diodes
  • Semiconductors
  • Terahertz Radiation
  • Transport Properties

Fields of Study

  • Materials science
  • Physics

Readers

  • Optical Physics and Photonics.
  • Semiconductor Device Technology

Technology Areas

  • Microelectronics