Principles of nanoparticle imaging using surface plasmons

Angela Demetriadou, Alexei A Kornyshev

Research output: Contribution to journalArticlepeer-review

31 Citations (Scopus)
61 Downloads (Pure)

Abstract

Unlike surface plasmon resonance sensors that detect integral changes to the optical properties of a sample, surface plasmon polariton-microscopy techniques can detect isolated nanoparticles in real-time through their plasmonic image, even of sub-wavelength dimensions. The feature characteristics and intensity of this plasmonic image are dependent on the nanoparticleʼs chemical composition and size. However, the lack of a theoretical model describing the principles forming a plasmonic image have hindered their understanding. In this article, we present a full-wave analytical model that describes electromagnetically the formation of the plasmonic image. Through our analytical model and numerical calculations, we show the properties of a plasmonic image from sub-wavelength to macroscopic particles of various chemical compositions.
Original languageEnglish
Article number013041
Number of pages13
JournalNew Journal of Physics
Volume17
DOIs
Publication statusPublished - 20 Jan 2015

Keywords

  • surface plasmon microscopy
  • surface plasmon diffraction
  • plasmonic image
  • single particle spectroscopy
  • nanoparticles
  • surface plasmon polaritons

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