Anisotropic light absorption by localized surface plasmon resonance in a thin film of gold nanoparticles studied by visible multiple-angle incidence resolution spectrometry

Akiyoshi Kasuya, Yuki Itoh, Tetsuo Okada, Masatoshi Osawa, Yukina Takahashi, Emiko Kazuma, Tetsu Tatsuma, Takeshi Hasegawa

Research output: Contribution to journalArticlepeer-review

8 Citations (Scopus)

Abstract

Anisotropic light absorptions via localized surface plasmon resonance in a gold-evaporated film parallel (in-plane; IP) and perpendicular (out-of-plane; OP) to the film surface are studied using visible multiple-angle incidence resolution spectrometry (Vis-MAIRS). When the thin film was aged for eighteen days, the time-dependent Vis-MAIRS IP spectra exhibited significantly different variation from that of the OP spectra: the IP spectra exhibited a large shift to the shorter wavelength side, whereas the OP spectra were explained by a linear combination of three-constituent spectra. The surface topographical analysis of the film revealed that a continuous film coalesced to form aggregates of metal particles. The intrinsic difference between the IP and OP spectra was readily elucidated by considering the surface-parallel and -perpendicular dipoles interaction depending on the topographical changes, which was confirmed by performing spectral simulation using metal particle array models.

Original languageEnglish
Pages (from-to)9691-9696
Number of pages6
JournalPhysical Chemistry Chemical Physics
Volume13
Issue number20
DOIs
Publication statusPublished - May 28 2011
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)
  • Physical and Theoretical Chemistry

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