Controlling light in complex media in space and time: Looking around corners and through turbid layers

TYPECondensed Matter Seminar
Speaker:Dr Ori Katz
Location:Lidow Nathan Rosen (300)

The propagation of light in inhomogeneous media, such as biological tissues and the turbulent atmosphere, results in wavefront distortion and scattering, which imposes a major limitation in many applications. Examples range from microscopy and nanosurgery to astronomy. In addition to the frequently encountered spatial distortions, multiple-scattering also randomly distorts thepolarization state of the incident light, and its temporal and spectral characteristics. However, although multiple-scattering is a random process, it is a deterministic one and it can be undone.

I'll show how using a single spatial light modulator (SLM) one can control and correct the spatial, temporal, spectral and polarization distortions in random media. I’ll demonstrate our scheme applicability for spatiotemporal focusing of femtosecond pulses through biological tissues, and for real-time imaging ‘around corners’ and through scattering layers, such as diffuse shower glass windows.