Diffuse reflection of a Bose-Einstein condensate from a rough evanescent   wave mirror
  We present experimental results showing the diffuse reflection of a Bose-Einstein condensate from a rough mirror, consisting of a dielectric substrate supporting a blue-detuned evanescent wave. The scattering is anisotropic, more pronounced in the direction of the surface propagation of the evanescent wave. These results agree very well with theoretical predictions. 
Helene Perrin, Yves Colombe, Brigitte Mercier, Vincent Lorent, and   Carsten Henkel