Optical Phase Conjugation with Less Than a Photon per Degree of Freedom.
Optical Phase Conjugation with Less Than a Photon per Degree of Freedom.
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光相结合，每个自由度小于光子。
DOI：
10.1103/physrevlett.118.093902
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发表时间：
2017-03-03
影响因子：
8.6
通讯作者：
Vellekoop IM
中科院分区：
文献类型：
--
作者：
Jang M;Yang C;Vellekoop IM
我们通过实验证明，即使检测到的每个光学自由度远少于一个光子，光学相位共轭也可以用于通过强散射介质聚焦光。我们发现，只要系统的分辨率足够高，可实现的最佳强度对比度等于检测到的光子总数。我们的结果表明，即使在光子预算极低的情况下也可以使用相位共轭，例如通过动态介质进行高速聚焦或在组织深处成像。
We demonstrate experimentally that optical phase conjugation can be used to focus light through strongly scattering media even when far less than a photon per optical degree of freedom is detected. We found that the best achievable intensity contrast is equal to the total number of detected photons, as long as the resolution of the system is high enough. Our results demonstrate that phase conjugation can be used even when the photon budget is extremely low, such as in high-speed focusing through dynamic media or imaging deep inside tissue.