Optical detection of electron-depletion region surrounding metal electrode on a dilute two-dimensional electron gas

Toshiyuki Ihara, Masahiro Yoshita, Hidefumi Akiyama, Loren N. Pfeiffer, Ken W. West

Research output: Contribution to journalArticlepeer-review

Abstract

Microscopic photoluminescence images were measured on a dilute two-dimensional electron gas (2DEG) in an n-type modulation doped quantum well at 5 K. We observed electron-depletion regions surrounding metal electrodes formed by annealing of soldered indium or evaporated AuGeNi. The difficulty of forming an ohmic contact to a dilute 2DEG was probably due to the depletion region separating the 2DEG from the metal electrode.

Original languageEnglish (US)
Pages (from-to)4496-4498
Number of pages3
JournalJapanese Journal of Applied Physics
Volume47
Issue number6 PART 1
DOIs
StatePublished - Jun 13 2008
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • General Engineering
  • General Physics and Astronomy

Keywords

  • Depletion region
  • Micro-PL imaging
  • Modulation doping
  • Ohmic contact
  • Quantum well
  • Two-dimensional electron gas

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