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Excitonic and optical confinement in microwire heterostructures with nonpolar (Zn,Cd)O/(Mg,Zn)O multiple quantum wells

Journal of Physical Chemistry C, ISSN: 1932-7447, Vol: 117, Issue: 17, Page: 9020-9024
2013
  • 4
    Citations
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  • 15
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Metrics Details

  • Citations
    4
    • Citation Indexes
      4
  • Captures
    15

Article Description

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 numbers from numerical calculations. © 2013 American Chemical Society.

Bibliographic Details

M. Lange; C. P. Dietrich; M. Lorenz; M. Grundmann

American Chemical Society (ACS)

Materials Science; Energy; Chemistry

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