Cathodoluminescence Profiling of InGaN-Based Quantum Well Structures and Laser Diodes -- In-Plane Instabilities of Light Emission

Abstract

Instabilities of light emission and also of stimulated emission in series of GaN epila yers and InGaN quantum well structures , including laser diode structures, are studied . A stimulated emission is observed under electron beam pumping. This enabled us to study light emission properties from laser structures and their relation to microstructure details. We demonstrate large in -plane fluctuations of light emission and that these fluctuations are also present for excitation densities larger than the threshold densities for the stimulated emission.