Fig. 1


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Nanoparticle-on-mirror schematics for gold NPs assembled d =1nm above a gold substrate, separated by a spacer of refractive index n = 1.45. A. Faceted spherical NPoM geometry for a 2rp = 80 nm NP with a facet diameter of fd = 20 nm. The inset shows the circular facet that is in contact with the spacer. B. RhoM geometry for a NP with side length a = 30nm and facet edge rounding ρ = 5 nm. The inset shows the three unique facets that may be assembled on the substrate.

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