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Authors: S. Rodriguez, A. Abass, B. Maes, O.T.A. Janssen, G. Vecchi, J. Gomez Rivas
Title: Coupling Bright and Dark Plasmonic Lattice Resonances
Format: International Journal
Publication date: 12/2011
Journal/Conference/Book: Physical Review X
Editor/Publisher: APS, 
Volume(Issue): 1(2) p.021019
DOI: 10.1103/physrevx.1.021019
Citations: 180 ( - last update: 7/7/2024)
48 (OpenCitations - last update: 3/5/2024)
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We demonstrate the coupling of bright and dark surface lattice resonances (SLRs), which are collective Fano resonances in 2D plasmonic crystals. As a result of this coupling, a frequency stop gap in the dispersion relation of SLRs is observed. The different field symmetries of the low- and high-frequency SLR bands lead to pronounced differences in their coupling to free-space radiation. Standing waves of very narrow spectral width compared to localized surface-plasmon resonances are formed at the highfrequency band edge, while subradiant damping onsets at the low-frequency band edge, leading the resonance into darkness. We introduce a coupled-oscillator analog to the plasmonic crystal, which serves to elucidate the physics of the coupled plasmonic resonances and which is used to estimate very high quality factors for SLRs.

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