| FUNDAMENTAL AREAS OF PHENOMENOLOGY(INCLUDING APPLICATIONS) |
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Nonlinear Photoluminescence from ZnO Nanobelts |
| ZHOU Zhang-Kai1, HAO Zhong-Hua1, MEI Zong-Wei2, WEN Xiao-Gang2, YANG Shi-He3 |
| 1Department of Physics and Key Laboratory of Acoustic and Photonic Materials and Devices (Ministry of Education), Wuhan University, Wuhan 4300722School of Material Science and Engineering, Sichuan University, Chengdu 6100653Department of Chemistry, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong |
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ZHOU Zhang-Kai, HAO Zhong-Hua, MEI Zong-Wei et al 2009 Chin. Phys. Lett. 26 024201 |
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Abstract The nonlinear photoluminescence (PL) including second-harmonic generation (SHG) and the multiphoton luminescence (MPL) around 385nm and 530nm from ZnO nanobelts are investigated by using near-infrared excitations. The excitation wavelength dependence of MPL intensity reveals resonant energy transfer from SHG to MPL near the band gap excitation. The lifetime measurement of the MPL shows a much slower decay process of the defect emission, which results from the generation and recombination of both donors and acceptors on the disordered surface of the ZnO nanobelts.
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| Keywords:
42.65.Ky
42.65.Re
78.47.Jc
78.55.Et
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Received: 04 June 2008
Published: 20 January 2009
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| PACS: |
42.65.Ky
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(Frequency conversion; harmonic generation, including higher-order harmonic generation)
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42.65.Re
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(Ultrafast processes; optical pulse generation and pulse compression)
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78.47.Jc
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78.55.Et
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(II-VI semiconductors)
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