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Spectral manipulation in a spoof plasmonic dimer under different excitation configurations
Applied Optics
|March 17, 2026
Summary
Excitation configuration significantly impacts spoof plasmonic dimer (SPD) spectral response. Understanding these configurations is key for designing advanced filters and sensors.
Area of Science:
- Optics and Photonics
- Plasmonics
- Metamaterials
Background:
- Spoof plasmonic dimers (SPDs) are crucial for subwavelength waveguiding.
- The influence of excitation configuration on SPD spectral response is often neglected.
- Resonance characteristics of SPDs are sensitive to external parameters.
Purpose of the Study:
- To systematically investigate the effect of distinct excitation schemes on coplanar SPD resonance.
- To provide analytical expressions for transmission coefficients under various excitation configurations.
- To demonstrate the role of excitation configuration in spectral modulation and Fano resonance shaping.
Main Methods:
- Temporal coupled-mode theory (TCMT) for analytical derivation.
- Full-wave simulations for validation.
- Experimental verification of theoretical predictions.
Main Results:
- Analytical expressions derived for transmission coefficients under different excitation configurations.
- Demonstrated that excitation conditions, coupling strength, and frequency detuning jointly control spectral response.
- Excitation configuration identified as a decisive factor in shaping Fano resonance profiles.
Conclusions:
- Excitation configuration is a critical parameter in SPD studies, not merely a secondary effect.
- The findings deepen the fundamental understanding of SPD behavior.
- Potential applications in filters, sensors, and integrated microwave devices are highlighted.
