Micro Photoluminescence Studies on Partially Ordered (GaIn)P: Evidence for Intrinsic Quantum Dots

Abstract

We report on micro photoluminescence measurements of partially ordered ((GaIn)P. We focus on the ordering induced low energy emission of this material. A systematic study of the dependence of the micro-PL spectra on the optical probe volume is presented. It was found that the low emission line of partially ordered (GaIn)P consists of single narrow lines, which are attributed to localized excitons. We further present strong evidence for a formation of intrinsic quantum dots in partially ordered (GaIn)P.