Figure 6

Simulated responsivities of a NP-PD device with a diameter of d_NP = 300 nm (Fig. 1a, b) and illuminated with E₀‖x and E₀‖y using varying material and geometry parameters. Results are shown for (a) and (b) variations of the superstrate refractive index n_sup at w = 100 nm and h = 50 nm, (c) and (d) variations of the NA geometry parameter w at h = 50 nm and n_sup = 1.0, (e) and (f) variations of the geometry parameter h at w = 100 nm and n_sup = 1.0. Field profiles E(x,y,z) for wavelengths indicated by the dashed lines are shown in the supplementary information.