SPECKLE CORRELATIONS IN THE LIGHT SCATTERED FROM A WEAKLY ROUGH ONE-DIMENSIONAL RANDOM METAL-SURFACE

Perturbation theory is used to compute the angular-intensity correlati on function C(q,k/q',k') = {[I(q/k) - {I(q/k)}][q'/k') - {I(q'/k')]} f or p-polarized light scattered from a weakly rough, one-dimensional ra ndom metal surface. I(q/k) is the squared modulus of the scattering ma trix for the system, and q, q! and K, k' are the projections on the me an scattering surface of the wave vectors of the scattered and the inc ident Light, respectively. Contributions to C include ia) short-range memory effect and time-reversed memory effect terms, C-(1); (b) an add itional short-range term of comparable magnitude C-(10); (c) a long-ra nge term C-(2); (d) an infinite-range term C-(3); and (e) a new term C -(1.5) that along with C-(2) displays peaks associated with the excita tion of surface polaritons. These new features arise when the factoriz ation approximation is not made in calculating the correlation functio n C. (C) 1991 Optical Society of America.