Fig. 4: Intensity map distributions for defocused Gaussian beams.
From: Correcting the formalism governing Bloch Surface Waves excited by 3D Gaussian beams
a The waist is at 300 μm under the first interface and 100 μm above this interface in b. The beam-waist is set to W0 = 5 μm and the mean angle of incidence corresponds to the Bloch Surface Wave (BSW) excitation. The dashed blue rectangle in a corresponds to a zoom-in over the region where incident and reflected beam overlap. The green dashed dotted-dotted line on Fig. c corresponds to the electric-field intensity along the Ox direction in the case of a waist perfectly centered on the first interface. The red dotted line corresponds to 20× the same quantity in Transverse Magnetic (TM) polarization (no excited BSW). The blue dashed and the black solid lines correspond to a and b cases.
