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Extra Green Light induced ZnO Ultraviolet Lasing Enhancement Assisted by Au Surface Plasmon

Abstract

It was observed the dramatic enhancement of the intrinsic spontaneous and stimulated emission as well as the ensuing suppression of the defect-related green emission in Au-decorated ZnO microrods. A series of spectral explore and theoretical discussion demonstrated an electron transfer assisted by surface plasmon (SP) resonant coupling between Au nanoparticle and ZnO. The mechanism indicates an approach to enhance UV emission of ZnO through an extra excitation of a visible light similar to the defect emission of ZnO. Based on the coupling mechanism, an externally enhanced ultraviolet lasing was further improved from 1.5 to 2.8-folds by adjusting the pumping power of green light intensity in the Au/ZnO hybrid cavity. This research not only further confirms the SPR-assisted electron transfer process but also offers an approach to improve the intrinsic U-V emission even for heavy-defect ZnO through a visible light excitation dispensed with a nonlinear process.

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Publication details

The article was received on 21 Oct 2017, accepted on 29 Nov 2017 and first published on 29 Nov 2017


Article type: Paper
DOI: 10.1039/C7NR07846C
Citation: Nanoscale, 2017, Accepted Manuscript
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    Extra Green Light induced ZnO Ultraviolet Lasing Enhancement Assisted by Au Surface Plasmon

    F. Qin, C. Xu, Q. Zhu, J. Lu, D. You, W. Xu, Z. Zhu, A. G. Manohari and F. Chen, Nanoscale, 2017, Accepted Manuscript , DOI: 10.1039/C7NR07846C

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