Spectroscopy of competing mechanisms generating stimulated emission in gallium nitride

Herzog, W. D.; Bunea, G. E.; Ünlü, M. S.; Goldberg, B. B.; Molnar, R. J.
December 2000
Applied Physics Letters;12/18/2000, Vol. 77 Issue 25, p4145
Academic Journal
Two competing recombination mechanisms of stimulated emission in the vicinity of 145 K have been directly observed in the temperature dependence of the optical emission spectra for high-quality, unintentionally doped gallium nitride. Our analysis of the spectra indicates that exciton-exciton scattering is responsible for stimulated emission below 145 K, while at higher temperatures an electron-hole plasma becomes the dominant mechanism. © 2000 American Institute of Physics.


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