Optical investigation of A-plane ZnO/ZnMgO multiple quantum wells grown by pulsed laser deposition

Der-Yuh Lin, T. P. Huang, Y. C. Kao, C. C. Huang, H. C. Kuo, Li Chang

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

In this study, we present the optical characteristics of A-plane ZnO/ZnMgO multiple quantum wells (MQWs) with different well widths grown on R-plane sapphire substrates by pulsed laser deposition (PLD). The energy gaps of ZnO and ZnMgO have been observed by photoluminescence (PL) and absorption spectra. The electrons confined in the ZnO wells transit from the electron ground sub-band to the heavy-hole ground sub-band (noted as 11H) located at 3.40 and 3.57 eV for the ZnO/ZnMgO MQWs samples with well widths of 5.6 and 1.2 nm, respectively. The strong anisotropic polarization characteristic has been studied by polarization-dependent PL measurements. For comparison, we also calculated the transition energies of different well thicknesses varying from 1 to 6 nm. The theoretical results match quite well with the experimental values and revealing the suitable conduction band offset Q c=0.6. The temperature dependence of PL spectra is being investigated, in the temperature range between 10 and 300 K.

Original languageEnglish
Pages (from-to)659-664
Number of pages6
JournalPhysica E: Low-Dimensional Systems and Nanostructures
Volume44
Issue number3
DOIs
Publication statusPublished - 2011 Dec 1

Fingerprint

Pulsed laser deposition
Semiconductor quantum wells
pulsed laser deposition
Photoluminescence
quantum wells
photoluminescence
Polarization
polarization characteristics
Electrons
Aluminum Oxide
transit
Conduction bands
Sapphire
Absorption spectra
conduction bands
sapphire
Energy gap
electrons
absorption spectra
Temperature

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Condensed Matter Physics

Cite this

Lin, Der-Yuh ; Huang, T. P. ; Kao, Y. C. ; Huang, C. C. ; Kuo, H. C. ; Chang, Li. / Optical investigation of A-plane ZnO/ZnMgO multiple quantum wells grown by pulsed laser deposition. In: Physica E: Low-Dimensional Systems and Nanostructures. 2011 ; Vol. 44, No. 3. pp. 659-664.
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Optical investigation of A-plane ZnO/ZnMgO multiple quantum wells grown by pulsed laser deposition. / Lin, Der-Yuh; Huang, T. P.; Kao, Y. C.; Huang, C. C.; Kuo, H. C.; Chang, Li.

In: Physica E: Low-Dimensional Systems and Nanostructures, Vol. 44, No. 3, 01.12.2011, p. 659-664.

Research output: Contribution to journalArticle

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