Effect of Heterostructure 2-D Electron Confinement on the Tunability of Resonant Frequencies of Terahertz Plasma-Wave Transistors

Taiichi Otsuji, Yoshihiro Kanamaru, Hajime Kitamura, Mitsuru Matsuoka, Osamu Ogawara

Research output: Contribution to journalArticlepeer-review

17 Citations (Scopus)

Abstract

This paper describes an experimental study on resonant properties of the plasma-wave field-effect transistors (PW-FET's). The PW-FET is a new type of the electron devices, which utilizes the plasma resonance effect of highly dense two-dimensional conduction electrons in the FET channel. Frequency tunability of plasma-wave resonance in the terahertz range was experimentally investigated for sub 100-nm gate-length GaAs MESFET's by means of laser-photo-mixing terahertz excitation. The measured results, including the first observation of the third-harmonic resonance in the terahertz range, however, fairly deviate from the ideal characteristics expected for an ideal 2-D confined electron systems. The steady-state electronic charge distribution in the MESFET channel under laser illumination was analyzed to study the effect of insufficient carrier confinement on the frequency tunability. The simulated results support the measured results. It was clarified that an ideal heterostructure 2-D electron confinement is essential to assuring smooth, monotonic frequency tunability of plasma-wave resonance.

Original languageEnglish
Pages (from-to)1985-1993
Number of pages9
JournalIEICE Transactions on Electronics
VolumeE86-C
Issue number10
Publication statusPublished - 2003 Oct
Externally publishedYes

Keywords

  • FET
  • HEMT
  • Harmonic resonance
  • Plasma wave
  • Polariton
  • Resonance
  • Terahertz

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Electrical and Electronic Engineering

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