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Related Experiment Video

Updated: Mar 25, 2026

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

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

Published on: July 21, 2018

High-Contrast Gratings based Spoof Surface Plasmons.

Zhuo Li^1,2,3, Liangliang Liu¹, Bingzheng Xu¹

¹Key Laboratory of Radar Imaging and Microwave Photonics, Ministry of Education, College of Electronic and Information Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing, 211106, China.

Scientific Reports

|February 17, 2016

Summary

This summary is machine-generated.

This study demonstrates spoof surface plasmons (SSPs) in deep-subwavelength high-contrast gratings (HCGs). The findings establish a unified theory for SSPs, advancing surface plasmon optics research.

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Area of Science:

Optics and Photonics
Metamaterials
Nanophotonics

Background:

Surface plasmon polaritons (SPPs) are electromagnetic waves coupled to electron oscillations at a metal-dielectric interface.
Spoof surface plasmons (SSPs) are engineered surface electromagnetic modes that mimic SPPs but exist on structures with subwavelength features.
High-contrast gratings (HCGs) offer unique optical properties due to their deep-subwavelength nature and high refractive index contrast.

Purpose of the Study:

To investigate the existence and properties of spoof surface plasmons (SSPs) supported by deep-subwavelength high-contrast gratings (HCGs).
To develop a unified theoretical framework for understanding SSPs in various grating structures.
To explore potential new applications in surface plasmon optics.

Main Methods:

Analytical derivation of the dispersion relation for HCG-based SSPs using multimode network theory and rigorous mode matching.
Numerical simulations to validate the derived dispersion relation.
Application of an effective medium approximation to obtain the analytical dispersion formula.

Main Results:

The dispersion relation of HCG-based SSPs was derived analytically.
The derived dispersion relation closely resembles that of SSPs on deep-subwavelength metallic gratings (MGs) and can be degenerated into it.
Numerical simulations confirmed the accuracy of the analytical dispersion relation.

Conclusions:

This work establishes a unified theoretical framework for spoof surface plasmons (SSPs).
The findings demonstrate that deep-subwavelength HCGs can effectively support SSPs.
The research opens new avenues for surface plasmon optics and metamaterial applications.