Delocalized lattice plasmon resonances show dispersive quality factors

Wei Zhou, Yi Hua, Mark D. Huntington, Teri W. Odom

Research output: Contribution to journalArticle

30 Citations (Scopus)

Abstract

This Letter describes how out-of-plane lattice plasmon (OLP) resonances in 2D Au nanoparticle (NP) arrays show dispersive quality factors. These quality factors can be tailored simply by controlling NP height. Numerical calculations of near-field optical properties and band diagrams were performed to understand the measured dispersion effects of the OLPs. The results revealed that delocalized OLPs are a type of surface Bloch mode composed of many Bloch harmonics. As the OLP dispersion evolves from a stationary state to a propagating state, the nonradiative loss decreases because of weak local field confinement, whereas the radiative loss increases because of strong coupling to the leaky zero-order harmonic.

Original languageEnglish
Pages (from-to)1381-1385
Number of pages5
JournalJournal of Physical Chemistry Letters
Volume3
Issue number10
DOIs
Publication statusPublished - May 17 2012

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ASJC Scopus subject areas

  • Materials Science(all)
  • Physical and Theoretical Chemistry

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