Regensburg 2013 – scientific programme

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DS: Fachverband Dünne Schichten

DS 14: Focus Session: Functionalized Semiconductor Nanowires I (jointly with HL)

DS 14.3: Topical Talk

Tuesday, March 12, 2013, 10:30–11:00, H8

Spectral and spatial overlap of oxide quantum wells and whispering gallery modes — •Marius Grundmann — Universität Leipzig, Insitut für Experimentelle Physik II

We present the fabrication of zinc oxide nano- and microwires and the epitaxial growth of oxide heterostructures and quantum wells around the zinc oxide cores in radial direction. (Mg,Zn)O/ZnO and (Cd,Zn)O/ZnO QWs are compared and found to not exhibit quantum confined Stark effect, as expected for the non-polar growth directions. Due to the hexagonal cross-section, the ZnO wires exhibit whispering gallery resonances. The spectral and spatial overlap of the quantum wells with the whispering gallery modes is achieved in various geometries. The coupling of exciton and photon modes will be discussed.
This work was conducted together with C.P. Dietrich, M. Lange, T. Böntgen and M. Stölzel and financially supported by DFG in the framework of FOR1616 and by ESF.