Coupled dipole approximation across the Γ-point in a finite-sized nanoparticle array

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Abstract

We study the response of a finite-sized nanoparticle array to an incident field in the vicinity of the Γ-point of the lattice. Using the coupled dipole approximation, we find that the dipole distributions can be strongly inhomogeneous and that strong modulations appear as the energy is above the Γ-point. We highlight how this is reflected in real-space extinction efficiencies as well as in radiation patterns from the finite-sized array.
Original languageEnglish
Article number0316
JournalPHILOSOPHICAL TRANSACTIONS OF THE ROYAL SOCIETY A: MATHEMATICAL PHYSICAL AND ENGINEERING SCIENCES
Volume375
Issue number2090
DOIs
Publication statusPublished - 20 Feb 2017
MoE publication typeA1 Journal article-refereed

Keywords

  • plasmonics
  • nanoparticle array
  • coupled dipole approximation

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