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Optimization of plasmon excitation at structured apertures
Evgeny Popov1, Michel Nevière, Anne-Laure Fehrembach
1Institut Fresnel, Unité Mixte de Recherche Associée au Centre National de la Recherche Scientifique 6133, Université de Provence, Faculté des Sciences et Techniques de St. Jérôme, 13397 Marseille 20, France. e.popov@fresnel.fr
Applied Optics
|October 26, 2005
Summary
This study investigates surface plasmon excitation through circular apertures in metallic screens to enhance electric fields. Optimization strategies for plasmon excitation using nanostructures are explored.
Area of Science:
- Optics and Photonics
- Electromagnetism
- Nanotechnology
Background:
- Surface plasmon excitation is crucial for manipulating light at the nanoscale.
- Circular apertures in metallic screens are key structures for plasmonic applications.
- Enhancing electric fields near metallic surfaces has significant technological implications.
Purpose of the Study:
- To theoretically and numerically investigate surface plasmon excitation via circular apertures.
- To optimize plasmon excitation for enhanced electric fields near metallic surfaces.
- To analyze the impact of cylindrical nanostructures on plasmon excitation.
Main Methods:
- Theoretical investigation using cylindrical coordinates and Fourier-Bessel basis expansion.
- Numerical analysis of electromagnetic scattering problems.
- Perturbation analysis for optimizing plasmon excitation with nanostructures.
Main Results:
- Systematic study of homogeneous solutions for electromagnetic scattering.
- Development of perturbation analysis for cylindrical nanostructures.
- Validation of analytical findings with rigorous electromagnetic calculations.
Conclusions:
- Surface plasmon excitation through structured apertures can significantly enhance electric fields.
- Cylindrical nanostructures offer a pathway for optimizing plasmon excitation.
- The findings align with rigorous electromagnetic diffraction theory.