Corbino-Capacitance technique for contactless measurements on conducting layers - application to persistent photoconductivity

Ole P. Hansen*, Anders Kristensen, Henrik Bruus, Manijeh Razeghi

*Corresponding author for this work

Research output: Contribution to journalConference articlepeer-review

Abstract

The technique utilizes the capacitive coupling between a pair of Corbino electrodes and a conducting layer placed on top of, and insulated from, the electrodes. Measurements on heterostructures of GaAs/GaAlAs and GaAs/GaInP are reported. The audio-frequency impedance exhibits Shubnikov-deHaas oscillations. These oscillations are used to investigate persistent photoconductivity at 0.635 μm and 1.00 μm illumination. The role played by contacts is discussed.

Original languageEnglish (US)
Pages (from-to)192-198
Number of pages7
JournalProceedings of SPIE - The International Society for Optical Engineering
Volume1362
Issue numberpt 1
StatePublished - Jan 1 1991
EventPhysical Concepts of Materials for Novel Optoelectronic Device Applications II: Device Physics and Applications - Aachen, Ger
Duration: Oct 28 1990Nov 2 1990

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

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