A simple theory of enhanced backscattering from weakly rough dielectric and metallic surfaces is presented in which constructive interference of time-reversed scattering paths is explicitly displayed. We show that, when starting from a perturbative second-order electromagnetic theory, one may calculate the backscattering intensity distribution from a single analytic formula. Excellent agreement is obtained with published results that were achieved with extensive numerical simulations. In the case of scattering from dielectric surfaces or lossless metallic surfaces, the angular width of the backscattering peak is determined solely by diffraction.
© 1993 Optical Society of America
R. T. Deck and H. J. Simon, "Simple diffractive theory of enhanced backscattering," J. Opt. Soc. Am. B 10, 1000-1005 (1993)