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Beam filter and splitter based on surface plasmon propagation in ring metal heterowaveguide

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Abstract

Surface plasmon polaritons (SPPs) beam filter (BF) and beam splitter (BS) constructed using metal heterostructures are proposed and demonstrated numerically. Both structures have a ring metal heterowaveguide, which is constructed by a metal cylinder and a ring dielectric cladding. The two-dimensional finite-difference time-domain (2D-FDTD) method is employed to study the properties of the proposed BF and BS, and the results show that SPPs can effectively propagate on bended plasmonic waveguides with dielectric claddings. By introducing dielectric and plasmonic waveguides on both sides of the resonant ring, SPPs can be efficiently excited at the output of the waveguide ring resonator (WRR) through mode coupling. The planar metal heterostructures provide a way for constructing various nanoscale counterparts of conventional planar integrated devices such as filters, splitters, resonators, sensors, optical switches, and so on.

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Acknowledgements

This work was financially supported by the National Natural Science Foundation (Grant Nos 61203211, 11304157), and the Natural Science Foundation of the Jiangsu Higher Education Institutions of China (Grant No. 13KJB140006). The authors would especially like to thank Dr Wei Zhang from Nanjing University of Science and Technology and Yi Xu from Guangzhou University for their useful discussions.

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Authors and Affiliations

  1. Optics and Photonic Technology Laboratory, Nanjing University of Information Science and Technology, Nanjing, 210044, China

    GAIGE ZHENG, LINHUA XU & YUNYUN CHEN

  2. School of Physics and Optoelectronic Engineering, Nanjing University of Information Science & Technology, Nanjing, 210044, China

    GAIGE ZHENG & LINHUA XU

  3. School of Science, Nanjing University of Science & Technology, Nanjing, 210094, China

    WEI SU

  4. Paul Scherrer Institute, WSLA-004, Villigen, CH 5232, Switzerland

    YUZHU LIU

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  1. GAIGE ZHENG
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  2. LINHUA XU
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  3. YUNYUN CHEN
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  4. WEI SU
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  5. YUZHU LIU
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Correspondence to GAIGE ZHENG.

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ZHENG, G., XU, L., CHEN, Y. et al. Beam filter and splitter based on surface plasmon propagation in ring metal heterowaveguide. Pramana - J Phys 83, 995–1002 (2014). https://doi.org/10.1007/s12043-014-0826-2

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  • DOI: https://doi.org/10.1007/s12043-014-0826-2

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