Observation of stimulated emission in the near ultraviolet from a molecular beam epitaxy grown GaN film on sapphire in a vertical-cavity, single pass configuration

Abstract
We report the first observation of stimulated emission from a GaN film grown by ion-assisted molecular beam epitaxy. The observed near-UV optical emission power was a nonlinear function of the pump power density. The characteristics of the observed stimulated emission are similar to those observed recently from films grown with low-pressure metalorganic chemical vapor deposition techniques.