Dr. Kewu Li Profile

Dr. Kewu Li

at North Univ of China

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Proceedings Article | 5 January 2017 Paper

Regulating the surface plasmon resonance coupling between Au-nanoparticle and Au-film

Shuang Wang, Kewu Li, Rui Zhang, Ning Jing, Youhua Chen, Yuanyuan Chen, Zhibin Wang

Proceedings Volume 10245, 1024509 (2017) https://doi.org/10.1117/12.2266808

KEYWORDS: Surface plasmons, Plasmonics

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In this paper, we report the coupling between the localized surface plasmon resonance (LSPR) of Au-nanoparticles and surface plasmon resonance (SPR) of the Au-film. According to the conditions for SPR excitation of the classical Kretschmann-Raether structure with 50nm Au thin film, the commonly used classes of spherical Au-nanoparticle is studied and optimized. We used the finite element analysis (COMSOL Multiphysics 5.0), to simulate the coupling. The results from calculation and simulation indicate that the resonant plasmonic coupling between Au-nanoparticles and Au-film could lead to a large field enhancement and thus improve SPR. We demonstrate that the resonant plasmonic coupling could be regulated by the size of nanoparticles, the distance between nanoparticles .

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