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The Coupling Behavior of Multiple Dipoles and Localized Surface Plasmons in Ag Nanoparticles Array

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Abstract

In this work, the coupling behavior of multiple dipoles and localized surface plasmons (LSPs) in Ag nanoparticle arrays is explored based on experimental results and 3D finite difference time domain (FDTD) simulations. The Ag nanoparticles (NPs) located inside the hexagonal photonic crystal (PhC) array holes are embedded in a green light-emitting diode (LED), which enhances emission efficiency significantly. In the simulation of the 3D FDTD, five spaced x-polarized dipoles are approximated as five quantum wells. The internal quantum efficiency (IQE) and light extraction efficiency (LEE) of the LSP-coupled LED are deduced respectively from the original IQE of the bare LED and the FDTD simulation results. Besides, the dynamic LSP-dipole coupling behavior is also explored considering the interaction of the five dipoles and their feedback effect to LSP, which lead to the magnification of the LSP-dipole coupling enhancement effect and the reduction of energy dissipation in Ag NPs.

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Acknowledgments

This work is supported by projects of the National Key Basic Research Special Foundation of China under Nos. TG2011CB301905 and TG2013CB328705, and the Natural Science Foundation of China under Nos. 61334009, 60876063, and 61076012. The authors are grateful to Prof. Weikun Ge from the Hong Kong University of Science and Technology for his useful discussion and English polishing.

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Authors and Affiliations

  1. School of Physics and State Key Laboratory of Artificial Microstructure and Mesoscopic Physics, Peking University, Beijing, 100871, China

    Shuang Jiang, Zhizhong Chen, Yulong Feng, Qianqian Jiao, Xingxing Fu, Jian Ma, Junze Li, Shengxiang Jiang, Tongjun Yu & Guoyi Zhang

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  1. Shuang Jiang
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  2. Zhizhong Chen
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  3. Yulong Feng
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  7. Junze Li
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  8. Shengxiang Jiang
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Correspondence to Zhizhong Chen.

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Jiang, S., Chen, Z., Feng, Y. et al. The Coupling Behavior of Multiple Dipoles and Localized Surface Plasmons in Ag Nanoparticles Array. Plasmonics 11, 125–130 (2016). https://doi.org/10.1007/s11468-015-0030-3

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  • DOI: https://doi.org/10.1007/s11468-015-0030-3

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