Applied Physics Letters 58(14), 1515 (1991).
The first observation of near-UV vertical-cavity stimulated emission from a photopumped GaN epilayer at room temperature is reported. The epilayer was deposited over AIN-coated basal plane sapphire substrate using low-pressure metalorganic chemical vapor deposition. Epitaxy quality of a 1.5-micron-thick GaN layer was high enough to achieve stimulated emission at room temperature. The observed near-UV optical emission power was a nonlinear function of the pump power density. At threshold power density, line narrowing and a shift of the peak UV emission toward longer wavelengths were also observed. Data comparing the UV emission for the vertical-cavity and the edge emission geometry are also presented.
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Contributed by the Journalmaster. More information is available from NASA's ADS database, with bibcode 1991ApPhL..58.1515K
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