Superbackscattering nanoparticle dimers

Iñigo Liberal, Iñigo Ederra, Ramón Gonzalo, Richard W. Ziolkowski

Research output: Contribution to journalArticlepeer-review

4 Scopus citations

Abstract

The theory and design of superbackscattering nanoparticle dimers are presented. We analytically derive the optimal configurations and the upper bound of their backscattering cross-sections. In particular, it is demonstrated that electrically small nanoparticle dimers can enhance the backscattering by a factor of 6.25 with respect to single dipolar particles. We demonstrate that optimal designs approaching this theoretical limit can be found by using a simple circuit model. The study of practical implementations based on plasmonic and high-permittivity particles has been also addressed. Moreover, the numerical examples reveal that the dimers can attain close to a fourfold enhancement of the single nanoparticle response even in the presence of high losses.

Original languageEnglish (US)
Article number274001
JournalNanotechnology
Volume26
Issue number27
DOIs
StatePublished - Jul 10 2015

Keywords

  • dimmers
  • electromagnetic
  • nanoparticles
  • scattering

ASJC Scopus subject areas

  • Bioengineering
  • Chemistry(all)
  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering
  • Electrical and Electronic Engineering

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