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Published October 21, 2020 | Accepted Version + Supplemental Material
Journal Article Open

Single-Shot Time-Reversed Optical Focusing into and through Scattering Media


Optical time reversal can focus light through or into scattering media, which raises a new possibility for conquering optical diffusion. Because optical time reversal must be completed within the correlation time of speckles, enhancing the speed of time-reversed optical focusing is important for practical applications. Although employing faster digital devices for time-reversal helps, more efficient methodologies are also desired. Here, we report a single-shot time-reversed optical focusing method to minimize the wavefront measurement time. In our approach, all information requisite for optical time reversal is extracted from a single-shot on-axis hologram, and hence, no other preconditions or measurements are required. In particular, we demonstrate the first realization of single-shot time-reversed ultrasonically encoded (TRUE) optical focusing into scattering media. By using the minimum amount of measurement, this work breaks the fundamental speed limit of digitally based time reversal for focusing into and through scattering media and constitutes an important step toward high-speed wavefront shaping applications.

Additional Information

© 2020 American Chemical Society. Received: July 21, 2020; Published: September 18, 2020. This work was financially supported by the National Institutes of Health (NIH) Grant R01 CA186567 (NIH Director's Transformative Research Award). The authors declare no competing financial interest.

Attached Files

Accepted Version - nihms-1665938.pdf

Supplemental Material - ph0c01154_si_001.pdf


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August 19, 2023
October 20, 2023