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Updated: Jun 17, 2026

Determination of the Excitation and Coupling Rates Between Light Emitters and Surface Plasmon Polaritons
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Determination of the Excitation and Coupling Rates Between Light Emitters and Surface Plasmon Polaritons

Published on: July 21, 2018

A tunable unidirectional surface plasmon polaritons source.

Yueke Wang1, Xueru Zhang, Haijun Tang

  • 1Department of Physics, Harbin Institute of Technology, No 92, West Da-Zhi Street, Harbin 150001, China.

Optics Express
|December 10, 2009
PubMed
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Researchers developed a tunable surface plasmon source using two silver films. This novel structure allows for unidirectional excitation of surface plasmon polaritons with controllable intensity splitting ratios.

Area of Science:

  • Photonics and Plasmonics
  • Nanotechnology
  • Optical Engineering

Background:

  • Surface plasmon polaritons (SPPs) are essential for nanoscale light manipulation.
  • Achieving controlled unidirectional excitation of SPPs remains a challenge.
  • Fabry-Perot (F-P) cavities offer a framework for understanding optical interference phenomena.

Purpose of the Study:

  • To introduce and investigate a novel tunable unidirectional surface plasmon source.
  • To explore the influence of structural parameters on SPP excitation.
  • To validate experimental findings with theoretical models.

Main Methods:

  • Fabrication of a nanostructure comprising two silver films with a nanoslit.
  • Utilizing the finite-difference time-domain (FDTD) method for field distribution analysis.

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Last Updated: Jun 17, 2026

Determination of the Excitation and Coupling Rates Between Light Emitters and Surface Plasmon Polaritons
07:39

Determination of the Excitation and Coupling Rates Between Light Emitters and Surface Plasmon Polaritons

Published on: July 21, 2018

Design, Fabrication, and Experimental Characterization of Plasmonic Photoconductive Terahertz Emitters
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Design, Fabrication, and Experimental Characterization of Plasmonic Photoconductive Terahertz Emitters

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Colloidal Synthesis of Nanopatch Antennas for Applications in Plasmonics and Nanophotonics

Published on: May 28, 2016

  • Modeling SPP interference within two effective Fabry-Perot cavities.

    • Main Results:

    • The structure enables tunable, unidirectional excitation of surface plasmon polaritons.
    • SPP intensity and splitting ratio exhibit periodic changes with bottom film movement.
    • FDTD results show excellent agreement with the F-P interferometer model.
    • A large intensity splitting ratio for unidirectional SPP excitation was achieved.

    Conclusions:

    • The proposed two-film nanostructure serves as an effective tunable unidirectional SPP source.
    • The observed periodic behavior is attributed to SPP interference in coupled F-P cavities.
    • This work provides a pathway for advanced nanoscale optical devices and applications.