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Highly Efficient Excitation of Surface Plasmon Polaritons Under Asymmetric Dielectric Surroundings

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Abstract

We demonstrate a single deep subwavelength slit for efficiently improving the excitation of surface plasmon polaritons (SPP) on metals through raising the dielectric permittivity of the output surrounding medium and numerically investigating their physical properties. Via adjusting the slit width and the output permittivity, either SPP launching intensity or its efficiency can be enhanced by almost 25 times and 170 %, respectively, compared with that under the symmetric surroundings. The underlying mechanisms are attributed to the spatial distribution change of the transmitted field and the plasmon density of state (DOS).

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Acknowledgments

This work was supported by the National Science Foundation of China (grant nos. 11304070 and 11274184), the Tian** National Natural Science Foundation (grant no. 12JCZDJC20200), and the Research Fund for the Doctoral Program of Higher Education of China (grant no. 20120031110032).

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Authors and Affiliations

  1. College of Life Information Science and Instrument Engineering, Hangzhou Dianzi University, 310018, Zhejiang, China

    Yan Guo

  2. Key Laboratory of Optical Information Science and Technology, Education Ministry of China, Institute of Modern Optics, Nankai University, Tian**, 300071, China

    Jianjun Yang

  3. HANGZHOU HANGYANG Co. Ltd, Hangzhou, 310014, Zhejiang, China

    Kuanbiao Li

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  1. Yan Guo
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  2. Jianjun Yang
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  3. Kuanbiao Li
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Correspondence to Jianjun Yang.

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Guo, Y., Yang, J. & Li, K. Highly Efficient Excitation of Surface Plasmon Polaritons Under Asymmetric Dielectric Surroundings. Plasmonics 11, 11–15 (2016). https://doi.org/10.1007/s11468-015-0008-1

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  • DOI: https://doi.org/10.1007/s11468-015-0008-1

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