Affordable Access

The role of gated and ungated plasma in THz detection by field effect transistors

Authors
  • Sakowicz, M.
  • Lusakowski, J.
  • Karpierz, K.
  • Grynberg, M.
  • Knap, W.
  • Köhler, K.
  • Valusis, G.
  • Golaszewska, K.
  • Kaminska, E.
  • Piotrowska, A.
Publication Date
Jan 01, 2009
Source
Fraunhofer-ePrints
Keywords
Language
English
License
Unknown
External links

Abstract

We present experimental results of THz detection signal dependence on the magnetic field. THz radiation was detected with AlGaAs/GaAs high electron mobility transistor where 2D plasma excitations are responsible for the detection signal appearance. We observe both Shubnikov - de Haas oscillations and cyclotron resonance in the detection signal. Fourier transform analysis of the oscillations allowed us to observe two parts of the 2D electron gas: gated and ungated. This allows us to conclude that 2D electrons in the transistor channel are necessary for detection process and both gated and ungated parts takes part in that process.

Report this publication

Statistics

Seen <100 times