Focusing light through a free-form scattering medium

Imaging and transport light through scattering opaque media is a hot topic pursued in multiple fields, ranging from nanotechnology to life sciences. A promising technique to do this is wavefront shaping (WFS), where the light propagation through a scattering medium is controlled by interference [1] [2] . Recently, the potential of WFS was even extended to, for instance, time-varying samples [3] [4] . In most cases to date, WFS has been done on the quintessential scattering sample geometry, namely in slabs.