Localized Surface Plasmons Selectively Coupled to Resonant Light in Tubular Microcavities

Vertical gold nanogaps are created on microtubular cavities to explore the coupling between resonant light supported by the microcavities and surface plasmons localized at the nanogaps. Selective coupling of optical axial modes and localized surface plasmons critically depends on the exact location...

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Bibliographic Details
Published in:Physical review letters 2016-06, Vol.116 (25), p.253904-253904, Article 253904
Main Authors: Yin, Yin, Li, Shilong, Böttner, Stefan, Yuan, Feifei, Giudicatti, Silvia, Saei Ghareh Naz, Ehsan, Ma, Libo, Schmidt, Oliver G
Format: Article
Language:English
Subjects:
Coupling
Gold
Holes
Microcavities
Nanostructure
Plasmons
Strategy
Thin films
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Summary:Vertical gold nanogaps are created on microtubular cavities to explore the coupling between resonant light supported by the microcavities and surface plasmons localized at the nanogaps. Selective coupling of optical axial modes and localized surface plasmons critically depends on the exact location of the gold nanogap on the microcavities, which is conveniently achieved by rolling up specially designed thin dielectric films into three-dimensional microtube cavities. The coupling phenomenon is explained by a modified quasipotential model based on perturbation theory. Our work reveals the coupling of surface plasmon resonances localized at the nanoscale to optical resonances confined in microtubular cavities at the microscale, implying a promising strategy for the investigation of light-matter interactions.
ISSN:0031-9007
1079-7114
DOI:10.1103/PhysRevLett.116.253904