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Lasing from an individual ZnO hexagonal microrod on the Au surface coated by a nanometer-scaled SiO2 layer

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Abstract

We demonstrate that an individual ZnO hexagonal microrod on the surface of Au substrates coated by a nanometer-scaled SiO2 layer can become a source for manufacture miniature ZnO plasmon lasers by surface plasmon polariton coupling with whispering-gallery modes (WGMs), and the SiO2 layer can tune the modes and intensity of ZnO emission. We achieve an abnormally low-threshold plasmonic WGM lasing from a ZnO hexagonal rod, and the threshold is 0.36 KW/cm2. These investigations show that this coupling mode holds a potential of ZnO hexagonal micro- and nanorods for data storage, bio-sensing, optical communications, as well as all-optic integrated circuits.

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Acknowledgments

The National Natural Science Foundation of China (91233203) and the State Key Laboratory of Optoelectronic Materials and Technologies of Sun Yat-sen University supported this work.

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Authors and Affiliations

  1. State Key Laboratory of Optoelectronic Materials and Technologies, Nanotechnology Research Center, School of Physics and Engineering, Sun Yat-sen University, Guangzhou, 510275, Guangdong, People’s Republic of China

    H. M. Dong, Y. H. Yang & G. W. Yang

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  1. H. M. Dong
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  2. Y. H. Yang
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  3. G. W. Yang
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Correspondence to G. W. Yang.

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Dong, H.M., Yang, Y.H. & Yang, G.W. Lasing from an individual ZnO hexagonal microrod on the Au surface coated by a nanometer-scaled SiO2 layer. Appl. Phys. A 120, 817–821 (2015). https://doi.org/10.1007/s00339-015-9333-7

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