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Controlling Diffraction of Surface Plasmon Polaritons in Nanoscale Metal Waveguide Arrays

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Abstract

In the paper, we investigate the feasibility of restraining the diffraction of propagating surface plasmon polaritons in nanoscale metal waveguide arrays (MWGAs). Based on the dispersion relation of MWGAs, two methods, tailoring the input end interface of the MWGAs and the surrounding medium and augmenting the wave vector of exciting light by auxiliary MWGAs, are proposed to excite the non-diffraction mode of MWGAs. All theoretical predictions are well demonstrated by the finite-difference time-domain numerical simulations.

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Acknowledgments

This work is financially supported by the National Nature Science Foundation of China (Grant No. 61205166 and J1210061).

Compliance with Ethical Standards

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Funding

This study was funded by the National Nature Science Foundation of China (Grant No. 61205166 and J1210061).

Conflict of Interest

The authors declare that they have no competing interests.

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Authors and Affiliations

  1. Key Laboratory of Artificial Micro- and Nano-structures of Ministry of Education and School of Physics and Technology, Wuhan University, Wuhan, 430072, China

    Qian Wang, Wenrui Hu, Jingwei Wei & Weihua Lin

Authors
  1. Qian Wang
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  2. Wenrui Hu
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  3. Jingwei Wei
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  4. Weihua Lin
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Correspondence to Weihua Lin.

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Wang, Q., Hu, W., Wei, J. et al. Controlling Diffraction of Surface Plasmon Polaritons in Nanoscale Metal Waveguide Arrays. Plasmonics 11, 117–124 (2016). https://doi.org/10.1007/s11468-015-0014-3

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  • DOI: https://doi.org/10.1007/s11468-015-0014-3

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