Molecular beam epitaxial growth of GaAs1-XNX with dispersive nitrogen source

S. Z. Wang*, S. F. Yoon, Tien Khee Ng, W. K. Loke, W. J. Fan

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

14 Scopus citations

Abstract

The great bowing parameter of GaAsN makes this material hopeful for the fabrication of 1.3 and 1.55 μm laser diodes and detectors. However, the effect of energetic nitrogen ion bombardment during growth may have a deleterious effect on the material quality. To avoid the bombardment effect of energetic nitrogen ions, a modified mode for GaAsN growth using dispersive nitrogen is reported. High-quality GaAsN epilayers and abrupt GaAsN/GaAs interfaces were demonstrated using this growth mode. For the first time, a GaAsN/GaAs double quantum well sample was grown with dispersive nitrogen source. Under our annealing conditions of 750°C from 10s to 10min, no significant evidence of nitrogen out-diffusion from the material was found. The improvement in optical quality due to annealing is attributed to the annihilation of nitrogen-related defects through atomic rearrangement of the lattice, the effect of which on the observed blueshift in the photoluminescence peak needs further investigation.

Original languageEnglish (US)
Pages (from-to)87-94
Number of pages8
JournalJournal of Crystal Growth
Volume242
Issue number1-2
DOIs
StatePublished - Jul 1 2002

Keywords

  • A3. Molecular beam epitaxy
  • A3. Quantum wells
  • B1. Nitrides

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Inorganic Chemistry
  • Materials Chemistry

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