Green emission from Er-doped GaN powder

Wu, Huaqiang; Poitras, Carl B.; Lipson, Michal; Spencer, Michael G.; Hunting, Janet; DiSalvo, Francis J.
May 2005
Applied Physics Letters;5/9/2005, Vol. 86 Issue 19, p191918
Academic Journal
Green light emission has been directly obtained from Er-doped GaN powder. Er is incorporated into GaN powder through the reaction between molten (Ga+Er) and NH3 at 950–1050 °C using Bi as a wetting agent. Photoexcitation with an Ar laser results in strong green emissions from two narrow lines at 537 and 558 nm, which are identified as Er transitions from the 2H11/2 and 4S3/2 levels to the 4I15/2 ground state. Microprobe analysis reveals that Er atoms are distributed across powder particles.


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