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Spatial Coherence Properties of Organic Molecules Coupled to Plasmonic Surface Lattice Resonances in the Weak and Strong Coupling Regimes

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Shi, L., Hakala, T. K., Rekola, H. T., Martikainen, J.-P., Moerland, R. J., Törmä, P.·2014·Physical Review Letters

Abstract

We study spatial coherence properties of a system composed of periodic silver nanoparticle arrays covered with a fluorescent organic molecule (DiD) film. The evolution of spatial coherence of this composite structure from the weak to the strong coupling regime is investigated by systematically varying the coupling strength between the localized DiD excitons and the collective, delocalized modes of the nanoparticle array known as surface lattice resonances. A gradual evolution of coherence from the weak to the strong coupling regime is observed, with the strong coupling features clearly visible in interference fringes. A high degree of spatial coherence is demonstrated in the strong coupling regime, even when the mode is very excitonlike (80%), in contrast to the purely localized nature of molecular excitons. We show that coherence appears in proportion to the weight of the plasmonic component of the mode throughout the weak-to-strong coupling crossover, providing evidence for the hybrid nature of the normal modes.

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Metadata

Authors
Shi, L., Hakala, T. K., Rekola, H. T., Martikainen, J.-P., Moerland, R. J., & Törmä, P.
Venue
Physical Review Letters
Published
2014-04-14
Volume
112
Issue
15
Pages
153002-153002
ISSN
  • 0031-9007 (ISSN-L)
  • 1079-7114
OpenAlex
W2067747909
Cited by
195
References
1
FWCI
10.93
Type
journal article
Language
en
Open access
green

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CoChat. (2026). Citation check: Spatial Coherence Properties of Organic Molecules Coupled to Plasmonic Surface Lattice Resonances in the Weak and Strong Coupling Regimes. https://app.cochat.ai/papers/10.1103/physrevlett.112.153002
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Shi, L., Hakala, T. K., Rekola, H. T., Martikainen, J.-P., Moerland, R. J., & Törmä, P. (2014). Spatial Coherence Properties of Organic Molecules Coupled to Plasmonic Surface Lattice Resonances in the Weak and Strong Coupling Regimes. Physical Review Letters. https://doi.org/10.1103/physrevlett.112.153002

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