Plasmon modes in single gold nanodiscs

K. Imura, K. Ueno, H. Misawa, H. Okamoto, D. McArthur, B. Hourahine, F. Papoff

Research output: Contribution to journalArticlepeer-review

23 Citations (Scopus)

Abstract

Optical properties of single gold nanodiscs were studied by scanning near-field optical microscopy. Near-field transmission spectra of a single nanodisc exhibited multiple plasmon resonances in the visible to near-infrared region. Near-field transmission images observed at these resonance wavelengths show wavy spatial features depending on the wavelength of observation. To clarify physical pictures of the images, theoretical simulations based on spatial correlation between electromagnetic fundamental modes inside and outside of the disc were performed. Simulated images reproduced the observed spatial structures excited in the disc. Mode-analysis of the simulated images indicates that the spatial features observed in the transmission images originate mainly from a few fundamental plasmon modes of the disc.

Original languageEnglish
Pages (from-to)12189-12199
Number of pages11
JournalOptics Express
Volume22
Issue number10
DOIs
Publication statusPublished - 2014 Jan 1

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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