Whispering gallery modes in high quality ZnSe∕ZnMgSSe microdisks with CdSe quantum dots studied at room temperature

Abstract

The authors observed whispering gallery modes with quality factors exceeding 2000 in ZnSe∕ZnMgSSe microdisks with self-assembled CdSe quantum dots at room temperature. The microdisks were realized by electron beam lithography and reactive ion etching and mounted on a glass plate. The far field emission of the microdisks exhibits a maximum in the direction parallel to the disk plane and couples efficiently into the glass plate. The microdisk spectra were analyzed in terms of mode separation for disk diameters ranging from 1.5to3.0μm. Transversal magnetic and transversal electric modes were identified.