Giant mid-IR resonant coupling to molecular vibrations in sub-nm gaps of plasmonic multilayer metafilms
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Abstract
Nanomaterials capable of confining light are desirable for enhancing
spectroscopies such as Raman scattering, infrared absorption, and nonlinear
optical processes. Plasmonic superlattices have shown the ability to host
collective resonances in the mid-infrared, but require stringent fabrication
processes to create well-ordered structures. Here, we demonstrate how
short-range-ordered Au nanoparticle multilayers on a mirror, self-assembled by
a sub-nm molecular spacer, support collective plasmon-polariton resonances in
the visible and infrared, continuously tunable beyond 11
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2047-7538
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Engineering and Physical Sciences Research Council (EP/L015978/1)
Engineering and Physical Sciences Research Council (EP/P029426/1)
Engineering and Physical Sciences Research Council (EP/R020965/1)
European Commission Horizon 2020 (H2020) Future and Emerging Technologies (FET) (829067)
Engineering and Physical Sciences Research Council (EP/S022953/1)
European Commission Horizon 2020 (H2020) Research Infrastructures (RI) (861950)
European Commission Horizon 2020 (H2020) ERC (883703)
Engineering and Physical Sciences Research Council (EP/P024947/1)
Engineering and Physical Sciences Research Council (EP/S019367/1)
Engineering and Physical Sciences Research Council (EP/R00661X/1)
EPSRC (via University of Manchester) (EP/X527257/1)