Delocalized Lattice Plasmon Resonances Show Dispersive Quality Factors | Zendy

Wei Zhou | Zendy; Yi Hua | Zendy; Mark D. Huntington | Zendy; Teri W. Odom | Zendy

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Delocalized Lattice Plasmon Resonances Show Dispersive Quality Factors

Author(s) -

Wei Zhou,

Yi Hua,

Mark D. Huntington,

Teri W. Odom

Publication year - 2012

Publication title -

the journal of physical chemistry letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.563

H-Index - 203

ISSN - 1948-7185

DOI - 10.1021/jz300318v

Subject(s) - delocalized electron , harmonics , plasmon , lattice (music) , condensed matter physics , materials science , localized surface plasmon , surface plasmon , molecular physics , physics , optoelectronics , quantum mechanics , voltage , acoustics

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.

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