Physics Commons^™

Coherent Enhancement Of Optical Remission In Diffusive Media, Nicholas Bender, Arthur Goetschy, Chia Wei Hsu, Hasan Yılmaz, Pablo Jara Palacios, Alexey Yamilov, Hui Cao

Physics Faculty Research & Creative Works

Remitted waves are used for sensing and imaging in diverse diffusive media from the Earth's crust to the human brain. Separating the source and detector increases the penetration depth of light, but the signal strength decreases rapidly, leading to a poor signal-to-noise ratio. Here, we show, experimentally and numerically, that wavefront shaping a laser beam incident on a diffusive sample enables an enhancement of remission by an order of magnitude at depths of up to 10 transport mean free paths. We develop a theoretical model which predicts the maximal remission enhancement. Our analysis reveals a significant improvement in the sensitivity …