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Hybridization of Singular Plasmons via Transformation Optics

by S. Yu and H. Ammari

(Report number 2018-26)

Abstract
Surface plasmons of strongly coupled metallic nanoparticles are useful for controlling light at the nanoscale. Here we develop a new physical model for understanding plasmons of the interacting many-particle systems. We combine both the plasmon hybridization and transformation optics approaches so that our model gives a simple and intuitive picture when the particles are close-to-touching. In the proposed approach, the system's plasmon is a combination of the gap-plasmons of each pair of particles. This provides new physical insights into how the spectrum of the plasmons depends on the geometry of the system.

Keywords: Plasmons, hybridization model, transformation optics, nonlocal effect, metasurface

@Techreport{YA18_780,
  author = {S. Yu and H. Ammari},
  title = {Hybridization of Singular Plasmons via Transformation Optics},
  institution = {Seminar for Applied Mathematics, ETH Z{\"u}rich},
  number = {2018-26},
  address = {Switzerland},
  url = {https://www.sam.math.ethz.ch/sam_reports/reports_final/reports2018/2018-26.pdf },
  year = {2018}
}

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