Gulliver Seminar : Sylvain Gigan (ENS)

Light in complex media : imaging, computing, and optical forces

Light propagation in complex media produces a well-known and universal interference pattern, called speckle. Our team has been interested in manipulating speckle patterns, by controlling the incident wavefront incident on the disordered material. I will show that this is particularly relevant for imaging, which is extremely challenging at depth in such media, for instance in biological tissues. We have also recently shown how the scattering process itself can be leveraged for analog computational tasks. Finally, I will present some recent results where we studied how active and passive particles behave in such speckle fields.