Room temperature excitonic stimulated emission from zinc oxide epilayers grown by plasma-assisted MBE

D. M. Bagnall*, Y. F. Chen, M. Y. Shen, Z. Zhu, T. Goto, T. Yao

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

391 Citations (Scopus)

Abstract

Spontaneous, stimulated and laser emission spectra of ZnO epitaxial layers, grown by plasma-assisted molecular beam epitaxy, are presented. Samples are found to exhibit high-intensity near band-edge emissions at room temperature, this is attributed to a dramatic reduction in the intensity of the deep-level emission which dominates ZnO produced by other techniques. Stimulated emission at room temperature is found to be due to exciton-exciton scattering at intermediate excitation intensities while at higher excitation intensities electron-hole plasma emission dominates. An example of longitudinal cavity modes is provided, clearly showing lasing at room temperature.

Original languageEnglish
Pages (from-to)605-609
Number of pages5
JournalJournal of Crystal Growth
Volume184-185
DOIs
Publication statusPublished - 2 Feb 1998
Externally publishedYes

Keywords

  • exciton
  • II-VI
  • laser
  • photoluminescence
  • stimulated emission
  • UV
  • ZnO

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