Interface and Bulk Standing Waves Drive the Coupling of Plasmonic Nanostar Antennas

Ted V. Tsoulos, Laura Fabris

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

Finite element simulations of the optical behavior of gold nanostars in water reveal a new view of collective electron cloud oscillations, where localized surface plasmon resonances coexist with coherent delocalized interface waves, i.e., propagating surface plasmons. Gold nanostar spikes long enough to allow propagating polaritons and short enough to resonate with the spherical core serve as the substrate for the observed overlap between propagating modes and localized hot spots. Transverse plane plots reveal bulk polaritons coupled to surface ones. In light of these observations, we explore the mechanisms that drive plasmonic coupling in nanostars from the single spike level to multispiked and multiparticle systems.

Original languageEnglish
Pages (from-to)28949-28957
Number of pages9
JournalJournal of Physical Chemistry C
Volume122
Issue number50
DOIs
Publication statusPublished - Dec 20 2018

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Energy(all)
  • Physical and Theoretical Chemistry
  • Surfaces, Coatings and Films

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