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Updated: May 28, 2026
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Determination of the Excitation and Coupling Rates Between Light Emitters and Surface Plasmon Polaritons
Published on: July 21, 2018
Simulation Study on Dielectric Constant Sensing by Interference of Spoof Surface Plasmon Polaritons
Ting Zeng1,2, Chunyang Bi3, Jun Zhou3
1School of Materials and Energy, University of Electronic Science and Technology of China, Chengdu 611731, China.
Micromachines
|May 27, 2026
Summary
This study introduces a new method for detecting material dielectric constant changes using spoof surface plasmon polaritons (SSPPs). The technique offers high precision and robustness for various applications.
Area of Science:
- Physics
- Materials Science
- Electrical Engineering
Background:
- Accurate material permittivity detection is crucial for electronics, materials science, and biomedicine.
- Existing methods face limitations in sample thickness and resonance intensity, hindering sensitive detection.
- Need for advanced techniques for dielectric constant analysis at specific frequencies.
Purpose of the Study:
- To develop a novel method for sensitive dielectric constant detection.
- To overcome limitations of current detection techniques.
- To enable precise material analysis at desired frequency bands.
Main Methods:
- Utilizing destructive interference of spoof surface plasmon polaritons (SSPPs) in a dual-path transmission structure.
- Exploiting the phase dependence of SSPPs on periodic units to create a phase difference at cutoff frequency.
- Analyzing shifts in the cutoff frequency absorption peak caused by sample interaction.
Main Results:
- The proposed method forms a characteristic absorption peak at the SSPPs' cutoff frequency.
- Sample coating alters boundary conditions, causing a measurable cutoff frequency shift.
- Simulations show a normalized characteristic frequency shift of 10.8%/εS with high robustness.
Conclusions:
- This work presents a novel, high-precision, and robust method for dielectric constant detection.
- The technique is based on SSPPs interference and cutoff frequency shifts.
- Demonstrated robustness against phase difference, sample thickness, and loss enhances its practical utility.
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