Time reversal is a technique that focuses waves onto a source or scatter by emitting a time-reversed version of the received wave field measured by an array of transducers. The refocusing property is due to the reciprocity in space and reversability in time for the wave field. The refocused wave field has a resolution that is proportional to the aperture and inverse proportional to the wave length and the propagation distance. However when the medium is inhomogeneous and random, the refocusing resolution may beat the diffraction limit, which is called super-resolution . The super-resolution phenomenon is caused by multipathing and is statistically stable in time domain due to self-averaging.

This refocusing property and the super-resolution phenomenon for time reversal can have many important applications in imaging, target detection, non-destructive testing and communications. Due to the common interest in time reversal and wave propagation phenomenon, we form this consortium and website to facilitate collaborations and communications among people with different perspectives, background and expertise. Our goal is for better understanding of wave propagation in random medium and time reversal phenomenon. We will develop efficient algorithms and study applications in imaging and secure communications.