Optimal spatiotemporal focusing through complex scattering media
Optics
2013-02-25 v1 Classical Physics
Abstract
We present a new approach for spatiotemporal focusing through complex scattering media by wave front shaping. Using a nonlinear feedback signal to shape the incident pulsed wave front, we show that the limit of a spatiotemporal matched filter can be achieved, i.e., the wave amplitude at the intended time and focus position is maximized for a given input energy. It is exactly what is also achieved with time-reversal. Demonstrated with ultrasound experiments, our method is generally applicable to all types of waves.
Cite
@article{arxiv.1302.5637,
title = {Optimal spatiotemporal focusing through complex scattering media},
author = {Jochen Aulbach and Alice Bretagne and Mathias Fink and Mickaël Tanter and Arnaud Tourin},
journal= {arXiv preprint arXiv:1302.5637},
year = {2013}
}