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. Author manuscript; available in PMC: 2013 May 9.
Published in final edited form as: Science. 2012 Aug 31;337(6098):1072–1074. doi: 10.1126/science.1224823

Fig. 4.

Fig. 4

Experimental confirmation of nonlocal contributions to surface plasmon scattering. (A) Schematic of NP-film gap system showing a gold NP separated from the film by an amine-terminated alkanethiol SAM. (B) Thickness of the SAM layers as a function of the number of carbon atoms. (C) Normalized dark-field measured spectra of ensembles of film-coupled NPs for SAM spacer layers of different numbers of carbon atoms. (D) Comparison of experimental measurements from both SAM and LBL type spacers with numerical results with β = 1.27×106m/s.