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

doi:10.1021/jp401809f

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

School of Physics and Astronomy

Research output: Contribution to journal › Article › peer-review

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 language	English
Pages (from-to)	9020-9024
Number of pages	5
Journal	Journal of Physical Chemistry C
Volume	117
Issue number	17
DOIs	https://doi.org/10.1021/jp401809f
Publication status	Published - 2 May 2013

Keywords

THIN-FILMS
ZNO

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10.1021/jp401809f

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

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.",

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T1 - Excitonic and Optical Confinement in Microwire Heterostructures with Nonpolar (Zn,Cd)O/(Mg,Zn)O Multiple Quantum Wells

AU - Lange, M.

AU - Dietrich, C. P.

AU - Lorenz, M.

AU - Grundmann, M.

PY - 2013/5/2

Y1 - 2013/5/2

N2 - 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.

AB - 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.

KW - THIN-FILMS

KW - ZNO

U2 - 10.1021/jp401809f

DO - 10.1021/jp401809f

M3 - Article

SN - 1932-7447

VL - 117

SP - 9020

EP - 9024

JO - Journal of Physical Chemistry C

JF - Journal of Physical Chemistry C

IS - 17

ER -

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

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Keywords

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