Measurement of the time-resolved reflection matrix for enhancing light energy delivery into a scattering medium.
Measurement of the time-resolved reflection matrix for enhancing light energy delivery into a scattering medium.
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DOI：
10.1103/physrevlett.111.243901
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发表时间：
2013-12-13
影响因子：
8.6
通讯作者：
Yaqoob Z
中科院分区：
文献类型：
--
作者：
Choi Y;Hillman TR;Choi W;Lue N;Dasari RR;So PT;Choi W;Yaqoob Z
混浊介质中发生的多次散射会减弱传播波的强度。在这里，我们提出了一种有效地将光能传输到散射介质中所需目标深度的方法。我们使用相干时间门控检测来测量散射介质的时间分辨反射矩阵。从该矩阵中，我们推导并实验实现了一种入射波模式，该模式优化了对应于特定到达时间的检测信号。这导致了在目标深度处增强的光传输。该方法将为在不久的将来进行有效的光疗和深部组织活体成像奠定基础。
Multiple scatterings occurring in a turbid medium attenuate the intensity of propagating waves. Here, we propose a method to efficiently deliver light energy to the desired target depth in a scattering medium. We measure the time-resolved reflection matrix of a scattering medium using coherent time-gated detection. From this matrix, we derive and experimentally implement an incident wave pattern that optimizes the detected signal corresponding to a specific arrival time. This leads to enhanced light delivery at the target depth. The proposed method will lay a foundation for efficient phototherapy and deep-tissue in vivo imaging in the near future.