Collective resonances in plasmonic crystals: Size matters

By S. Rodriguez, M. Schaafsma, A. Berrier, Jaime Gómez Rivas. 2012

143 citations recorded by the source corpus.

Abstract Periodic arrays of metallic nanoparticles may sustain surface lattice resonances (SLRs), which are collective resonances associated with the diffractive coupling of localized surface plasmons resonances (LSPRs). By investigating a series of arrays with varying number of particles, we traced the evolution of SLRs to its origins. Polarization resolved extinction spectra of arrays formed by a few nanoparticles were measured, and found to be in very good agreement with calculations based on a coupled dipole model. Finite size effects on the optical properties of the arrays are observed, and our results provide insight into the characteristic length scales for collective plasmonic effects: for arrays smaller than ∼ 5 × 5 particles, the Q-factors of SLRs are lower than those of LSPRs; for arrays larger than ∼ 20 × 20 particles, the Q-factors of SLRs saturate at a much larger value than those of LSPRs; in between, the Q-factors of SLRs are an increasing function of the number of particles in the array.

Subfields: Biomedical Engineering, Electronic, Optical and Magnetic Materials, Surfaces, Coatings and Films

View Paper: https://www.semanticscholar.org/paper/a4b4cad2669f45e4ab492b9c91e3df9a57b1d8d8

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In Biomedical Engineering

  1. Viktoriia E. Babicheva
  2. Andrey Evlyukhin

In Electronic, Optical and Magnetic Materials

  1. Viktoriia E. Babicheva
  2. Andrey Evlyukhin

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