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Ultraviolet lasing in Zn-rich ZnO microspheres fabricated by laser ablation

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Abstract

Zinc (Zn) surface plasmons (SPs) have been widely reported for their impressive performance in improving the optical properties of semiconductors. Zn is an effective metal with SPs response in the ultraviolet region, but the disadvantage of strong metal activity limits the application mentioned above. Here, in order to ensure the stability of metal Zn, ZnO/Zn microspheres were synthesized by an one-step laser ablation method to distribute Zn nanoparticles simultaneously on both inner and outer surfaces of ZnO microspheres. Lasing performance enhancement and a lower threshold were obtained in the composite which originates from the coupling between Zn SPs and the excitation light source. Accompanied by the lasing emission measurements, the coupling mechanism was explained through time-resolved photoluminescence spectroscopy (TRPL) for the samples by rapid annealing in situ. This work displays the results of lasing enhancement and the physical process of Zn SPs resonance in the ZnO/Zn microsphere.

Graphical abstract: Ultraviolet lasing in Zn-rich ZnO microspheres fabricated by laser ablation

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Publication details

The article was received on 10 May 2018, accepted on 29 Aug 2018 and first published on 29 Aug 2018


Article type: Paper
DOI: 10.1039/C8NR03799J
Citation: Nanoscale, 2018, Advance Article
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    Ultraviolet lasing in Zn-rich ZnO microspheres fabricated by laser ablation

    X. X. Wang, C. X. Xu, F. F. Qin, Y. J. Liu, A. G. Manohari, D. T. You, W. Liu, F. Chen, Z. L. Shi and Q. N. Cui, Nanoscale, 2018, Advance Article , DOI: 10.1039/C8NR03799J

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