Direct reconstruction of surfaces from near-field intensity under spatially incoherent illumination.
We solve the inverse scattering problem for a surface profile by measuring the intensity of the scattered near field. It was shown numerically [Opt. Lett. 20, 949 (1995)] that the image produced by the superposition of different images taken with all possible angles of incidence closely follows the surface profile. We establish a rigorous analysis of this method based on perturbation theory. Furthermore, we prove that the procedure is equivalent to illuminating the surface with incoherent light and thus has broad experimental applications.
Carminati
R
R
Greffet
J J
JJ
García
N
N
Nieto-Vesperinas
M
M