期刊
NATURE PHOTONICS
卷 7, 期 4, 页码 300-305出版社
NATURE PUBLISHING GROUP
DOI: 10.1038/NPHOTON.2013.31
关键词
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资金
- National Science Scholarship
- Agency for Science, Technology and Research, Singapore
- National Institutes of Health [1DP2OD007307-01]
- Defense Advanced Research Projects Agency [W31P4Q-11-1-0008]
Focusing of light in the diffusive regime inside scattering media has long been considered impossible. Recently, this limitation has been overcome with time reversal of ultrasound-encoded light (TRUE), but the resolution of this approach is fundamentally limited by the large number of optical modes within the ultrasound focus. Here, we introduce a new approach, time reversal of variance-encoded light (TROVE), which demixes these spatial modes by variance encoding to break the resolution barrier imposed by the ultrasound. By encoding individual spatial modes inside the scattering sample with unique variances, we effectively uncouple the system resolution from the size of the ultrasound focus. This enables us to demonstrate optical focusing and imaging with diffuse light at an unprecedented, speckle-scale lateral resolution of similar to 5 mu m.
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