Journal article

The Dark Side of Plasmonics

DE Gomez, ZQ Teo, M Altissimo, TJ Davis, S Earl, A Roberts

NANO LETTERS | AMER CHEMICAL SOC | Published : 2013

Abstract

Plasmonic dark modes are pure near-field modes that can arise from the plasmon hybridization in a set of interacting nanoparticles. When compared to bright modes, dark modes have longer lifetimes due to their lack of a net dipole moment, making them attractive for a number of applications. We demonstrate the excitation and optical detection of a collective dark plasmonic mode from individual plasmonic trimers. The trimers consist of triangular arrangements of gold nanorods, and due to this symmetry, the lowest-energy dark plasmonic mode can interact with radially polarized light. The experimental data presented confirm the excitation of this mode, and its assignment is supported with an elec..

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