Single-shot time-reversed optical focusing into and through scattering media.
Single-shot time-reversed optical focusing into and through scattering media.
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DOI:
10.1021/acsphotonics.0c01154
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发表时间:
2020-10-21
期刊:
影响因子:
7
通讯作者:
Wang LV
中科院分区:
文献类型:
--
作者:
Cheng Z;Yang J;Wang LV
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 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. An optical time-reversal method is proposed which enables optical focusing both into and through scattering media based on a single-shot hologram.
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