Plasmon modes in single gold nanodiscs

Kohei Imura, Kosei Ueno, Hiroaki Misawa, Hiromi Okamoto, Duncan McArthur, Benjamin Hourahine, Francesco Papoff

Research output: Contribution to journalArticle

23 Citations (Scopus)
126 Downloads (Pure)

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
Early online date13 May 2014
DOIs
Publication statusPublished - 2014

Keywords

  • optical properties
  • single gold nanodiscs
  • plasmon modes
  • near-field optical microscopy

Fingerprint Dive into the research topics of 'Plasmon modes in single gold nanodiscs'. Together they form a unique fingerprint.

  • Cite this

    Imura, K., Ueno, K., Misawa, H., Okamoto, H., McArthur, D., Hourahine, B., & Papoff, F. (2014). Plasmon modes in single gold nanodiscs. Optics Express, 22(10), 12189-12199. https://doi.org/10.1364/OE.22.012189