Focusing coherent light through opaque strongly scattering media

Opt Lett. 2007 Aug 15;32(16):2309-11. doi: 10.1364/ol.32.002309.


We report focusing of coherent light through opaque scattering materials by control of the incident wavefront. The multiply scattered light forms a focus with a brightness that is up to a factor of 1000 higher than the brightness of the normal diffuse transmission.