title: Monolithic ZnTe-based pillar microcavities containing CdTe quantum dots.
abstract: Micropillars of different diameters have been prepared by focused ion beam milling out of a planar ZnTe-based cavity. The monolithic epitaxial structure, deposited on a GaAs substrate, contains CdTe quantum dots embedded in a ZnTe λ-cavity delimited by two distributed Bragg reflectors (DBRs). The high refractive index material of the DBR structure is ZnTe, while for the low index material a short-period triple MgTe/ZnTe/MgSe superlattice is used. The CdTe quantum dots are formed by a novel Zn-induced formation process and are investigated by scanning transmission electron microscopy. Micro-photoluminescence measurements show discrete optical modes for the pillars, in good agreement with calculations based on a vectorial transfer matrix method. The measured quality factor reaches a value of 3100.
authors.affiliation: Institute of Solid State Physics, Semiconductor Epitaxy, University of Bremen, PO Box 330 440, D-28334 Bremen, Germany. ckruse@ifp.uni-bremen.de
authors.forename: Carsten
authors.initials: C
authors.lastname: Kruse
authors.forename: Wojciech
authors.initials: W
authors.lastname: Pacuski
authors.forename: Tomasz
authors.initials: T
authors.lastname: Jakubczyk
authors.forename: Jakub
authors.initials: J
authors.lastname: Kobak
authors.forename: Jan A
authors.initials: JA
authors.lastname: Gaj
authors.forename: Kristian
authors.initials: K
authors.lastname: Frank
authors.forename: Marco
authors.initials: M
authors.lastname: Schowalter
authors.forename: Andreas
authors.initials: A
authors.lastname: Rosenauer
authors.forename: Matthias
authors.initials: M
authors.lastname: Florian
authors.forename: Frank
authors.initials: F
authors.lastname: Jahnke
authors.forename: Detlef
authors.initials: D
authors.lastname: Hommel