Jeong Seungwon, Kim Dong-Young, Lee Ye-Ryoung, Choi Wonjun, Choi Wonshik
Opt Express. 2019 Apr 15;27(8):10936-10945. doi: 10.1364/OE.27.010936.
In complex media, light waves are diffused both in space and time due to multiple light scattering, and its intensity is attenuated with the increase of propagation depth. In this paper, we propose an iterative wavefront shaping method for enhancing time-gated reflection intensity, which leads to efficient light energy delivery to a target object embedded in a highly scattering medium. We achieved an over 10 times enhancement of reflectance at the specific flight time and demonstrated the focusing of light energy to the target object. Since the proposed method does not require reflection matrix measurement, it will be highly suited to samples in mechanically dynamic conditions.
在复杂介质中，由于多次光散射，光波在空间和时间上都会发生扩散，并且其强度会随着传播深度的增加而衰减。在本文中，我们提出了一种迭代波前整形方法来增强时间选通反射强度，从而实现将高效光能传输到嵌入高散射介质中的目标物体上。我们在特定飞行时间实现了反射率超过10倍的增强，并证明了光能聚焦到目标物体上。由于所提出的方法不需要测量反射矩阵，因此它将非常适合处于机械动态条件下的样品。
