期刊
OPTICS LETTERS
卷 41, 期 21, 页码 4895-4898出版社
OPTICAL SOC AMER
DOI: 10.1364/OL.41.004895
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资金
- National Natural Science Foundation of China (NSFC) [U1332105, 61227009, 91321102]
- Fundamental Research Funds for Central Universities [20720160020]
In this Letter, we report on the structural and optical characteristics of ZnO films with a wurtzite structure grown on MgO (001) substrates with cubic structures. The ZnO films were prepared through the molecular beam epitaxy method, and growth orientation transformation from [0001] to [1010] direction was observed with the change of growth temperature and thickness. The x-ray diffraction pole figures and in situ RHEED patterns demonstrated that the rotational relationship among grains within the ZnO films appeared in a typical two-fold rotation of about 30 degrees for the [0001] growth orientation and four-fold rotation of about 30 degrees or 60 degrees for the [10-10] growth orientation, respectively. Last, we investigated their optical properties through measuring the transmission and photoluminescence spectra of the ZnO films, which showed the bulk-like bandgap feature of the ZnO films in spite of the existing growth orientation transformation. (C) 2016 Optical Society of America
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