Low temperature scanning tunneling microscope-induced luminescence of GaN

S. Evoy, C. K. Harnett, H. G. Craighead, T. J. Eustis, W. A. Davis, M. J. Murphy, W. J. Schaff, L. F. Eastman

Research output: Contribution to journalArticle

7 Scopus citations

Abstract

We report the low temperature scanning tunneling microscope-induced luminescence of molecular beam epitaxy grown α-GaN. Semiquantitative spectroscopic analysis suggests near band edge emission, as well as emission covering the rest of the visible range. The relative intensity of band edge emission increases by one order of magnitude under liquid helium cooling. We also report the first photon emission images of GaN obtained with this technique. These images reveal stronger band edge emission at the center of crystallites. This study is complemented with a scanning electron microscope-induced cathodoluminescence analysis. Cathodoluminescence is dominated by the hexagonal (D°, X) transition and reveals evidence of small quantities of the cubic phase.

Original languageEnglish (US)
Pages (from-to)1943-1947
Number of pages5
JournalJournal of Vacuum Science and Technology B: Microelectronics and Nanometer Structures
Volume16
Issue number4
DOIs
StatePublished - 1998

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Electrical and Electronic Engineering

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