Table 1.

Raman intensity for the Raman shift of 1338 cm${}^{-1}$ of the conjugate AuNP-DTNB on the metasurface vs. flat plane (in a.u.). The signal is collected from red frames, shown in Figure 31; normalized signal is obtained by dividing by the number of Au nanoparticles in a frame.

Au-NP Localization	Signal (Counts)	Au-NP Number	Normalized Signal
Pyramid side	786	1	786
Between pyramids	553	30	18.4
Outside of grating	553	89	6.2