Potential imaging in quantum Hall devices by optical fiber based pockels measurement

M. Dohi, Ryo Yonamine, K. Oto, K. Muro

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)

Abstract

We have developed an optical-fiber-based Hall potential imaging system using the Pockels effect in GaAs/AlGaAs two dimensional electron systems (2DES) in the quantum Hall regime to investigate current distributions. The mapping of the Hall potential shows the current concentration at the bulk region of 2DES samples, where the critical current depends on the channel width sub-linearly. We report in detail the experimental techniques of the imaging system operating in high magnetic fields.

Original languageEnglish
Pages (from-to)1414-1418
Number of pages5
JournalInternational Journal of Modern Physics B
Volume21
Issue number8-9
Publication statusPublished - 2007 Apr 10
Externally publishedYes

Keywords

  • Pockels effect
  • Potential distribution
  • Quantum Hall effect

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)
  • Condensed Matter Physics
  • Electronic, Optical and Magnetic Materials
  • Statistical and Nonlinear Physics
  • Mathematical Physics

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