Broadband transmission enhancement through opaque barriers in diffusive disordered slabs: effect of absorption and symmetry defects

International audience; In a recent paper we report on a significant and broadband enhancement of the transmission through an opaque barrier when placed between symmetric diffusive slabs. In order to show if this effect could be observed experimentally, we raise the questions of the robustness of the observed enhancement to absorption and symmetry defects. Introducing losses, we adapt a scaling model from the conservative case to the non-conservative one. We show that while weakened, the enhancement is still observed and is mainly driven by the absorption length of the media. The sensitivity of this phenomenon to symmetry defects is then investigated by associating the deterioration of the enhancement with the positions of the symmetry defects that could be particularly interesting for non-destructive testing applications. We also propose a probabilistic model to estimate the conductance of a medium with a number of randomly distributed defects.