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High-order localized spoof surface plasmon resonances and experimental verifications
Zhen Liao1, Yu Luo2, Antonio I Fernández-Domínguez3
1State Key Laboratory of Millimetre Waves, Southeast University, Nanjing 210096, China.
Scientific Reports
|April 16, 2015
Summary
We demonstrated high-order radial spoof localized surface plasmon resonances in textured metal particles. These findings enable the design of broadband plasmonic devices operating across various frequencies.
Area of Science:
- Physics
- Materials Science
- Electromagnetism
Background:
- Spoof localized surface plasmons (SLSPs) are crucial for subwavelength electromagnetic confinement.
- Understanding high-order SLSP modes is essential for advanced plasmonic device design.
Purpose of the Study:
- To theoretically demonstrate and experimentally verify high-order radial spoof localized surface plasmon resonances.
- To investigate the properties and potential applications of these novel electromagnetic modes.
Main Methods:
- Effective medium theory for theoretical modeling.
- Exact numerical simulations for electromagnetic mode analysis.
- Experimental fabrication and characterization of ultrathin metal disks.
Main Results:
- High-order radial spoof plasmon resonances were observed and verified.
- Excellent agreement between theoretical predictions and experimental results was achieved.
- Spectral and near-field properties of the resonances were characterized.
Conclusions:
- Geometrically-originated electromagnetic modes were identified at microwave frequencies.
- The study deepens the understanding of spoof localized surface plasmon behavior.
- Findings pave the way for designing broadband plasmonic devices for diverse frequency regimes.
