论文标题
基于强度传输矩阵后面的粒子操纵
Particle manipulation behind turbid medium based on intensity transmission matrix
论文作者
论文摘要
光学镊子可以操纵小颗粒。但是，由散射介质引起的失真限制了光学镊子的应用。波前塑形技术在内，包括传输矩阵（TM）方法是实现散射介质后面光线的强大工具。在本文中，我们提出了一种新型的TM，称为强度传输矩阵（ITM）。仅依靠强度分布，我们只能使用广泛使用的四个相法的大约1/4测量时间来计算ITM。同时，ITM方法可以避免全息调制引入的衍射能量损失。基于ITM，我们在单个和多个粒子上实施了具有高度自由度的粒子操作。此外，操作范围在二十倍以上（与记忆效应相比）增加到200μm。
Optical tweezers can manipulate tiny particles. However, the distortion caused by the scattering medium restricts the applications of optical tweezers. Wavefront shaping techniques including the transmission matrix (TM) method are powerful tools to achieve light focusing behind the scattering medium. In this paper, we propose a new kind of TM, named intensity transmission matrix (ITM). Only relying on the intensity distribution, we can calculate the ITM with only about 1/4 measurement time of the widely used four-phase method. Meanwhile, ITM method can avoid the energy loss in diffraction introduced by holographic modulation. Based on the ITM, we have implemented particle manipulation with a high degree of freedom on single and multiple particles. In addition, the manipulation range is enlarged over twenty times (compared with the memory effect) to 200 μm.
