Excitonic and Optical Confinement in Microwire Heterostructures with Nonpolar (Zn,Cd)O/(Mg,Zn)O Multiple Quantum Wells

M. Lange, C. P. Dietrich, M. Lorenz, M. Grundmann*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)

Abstract

Nonpolar (Zn,Cd)O/(Mg,Zn)O multiple quantum Wells (MQWS) were deposited in radial direction on ZnO nanowires using pulsed laser deposition. The heterostructures with diameters in the micro regime exhibit both excitonic and optical confinement. Making use of the quantum confinement effect, the QW-related emission was tuned between 2.46 and 3.35 eV. Because of the cavity properties of the resonator with hexagonal cross section, hexagonal whispering gallery modes (WGMs) are observed up to energies close to the (Mg,Zn)O bandgap, enabling a spatial and spectral overlap of the MQW luminescence and the WGM. The resonant WGM energies were reproduced by using resonant Wave numerical calculations.

Original languageEnglish
Pages (from-to)9020-9024
Number of pages5
JournalJournal of Physical Chemistry C
Volume117
Issue number17
DOIs
Publication statusPublished - 2 May 2013

Keywords

  • THIN-FILMS
  • ZNO

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