A Correlation method for the determination of the dyadic Green's function of the electromagnetic field in diffraction problem

A correlation method is developed for the determination of the dyadic Green's function of the electromagnetic field in the presence of diffracting body. The dyadic Green's function G(r, t/r
s
, t') is determined by the temporal correlation function between a Gaussian and white random current source J(t') situated at r
s
and the electric field E(r, t) observed at a point r.