Optimal spatiotemporal focusing through complex scattering media

We present an alternative 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...

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Bibliographic Details
Published in:Physical review. E, Statistical, nonlinear, and soft matter physics Statistical, nonlinear, and soft matter physics, 2012-01, Vol.85 (1 Pt 2), p.016605-016605, Article 016605
Main Authors: Aulbach, Jochen, Bretagne, Alice, Fink, Mathias, Tanter, Mickaël, Tourin, Arnaud
Format: Article
Language:English
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Summary:We present an alternative 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.
ISSN:1539-3755
1550-2376
DOI:10.1103/PhysRevE.85.016605