Figure 2
From: Strong optical absorption of a metallic film to induce a lensing effect in the visible region
Due to the nonuniform optical path distribution of the light traveling through a Au film with a prism angle of θ = 62.0 μrad along the x direction, the intensity distribution of the full width at half maximum (FWHM) of the light emerging from the sample is narrowed by a factor of approximately 1.85 in the x direction with respect to that in the y direction.
