Fig. 4.

Log scale of intensity of each diffracted order for N = 13 (white) and N = 50 (black); these were calculated with n_oil of 1.78 incident at 54 degrees (plasmonic angle) with 633 nm incident wavelength where the sample was a rod array (n_rod = 1.5) with grating period of 10 μm, 1 nm thick and 400 nm in radius.