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

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 dee...

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Bibliographic Details
Published inJournal of crystal growth Vol. 184; pp. 605 - 609
Main Authors Bagnall, D.M., Chen, Y.F., Shen, M.Y., Zhu, Z., Goto, T., Yao, T.
Format Journal Article
LanguageEnglish
Published Elsevier B.V 01.02.1998
Subjects
Exciton
II–VI
Laser
Photoluminescence
Stimulated emission
ZnO
78.55.Et
UV
78.45. + h
Exciton
81.05. −t
Stimulated emission
Laser
Photoluminescence
II–VI
ZnO
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Summary: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.
ISSN:0022-0248
1873-5002
DOI:10.1016/S0022-0248(98)80127-9