Fig. 5: Wavelength-specified dynamic range of the local-field response.

a Maximal excitation enhancement factors (coloured data points) and corresponding excitation polarizations (coloured polarization ellipses) for specified excitation wavelengths. The solid black curve shows the numerically obtained maximal excitation enhancement factors. The error bars are extracted from the standard error of the time-integrated photon counting of the photoluminescence. b Wavelength-specified dynamic range of the local-field response. The solid curve is the numerically obtained wavelength-specified dynamic range