论文标题
动态创建纳米颗粒操纵的不对称潜力井
Dynamically creating asymmetrical potential wells for nanoparticle manipulation
论文作者
论文摘要
光学镊子是诱捕和操纵颗粒的强大工具，在许多区域已被广泛使用。但是，它们的潜在井通常是对称的，这限制了它们的光学诱捕和操纵能力。在此，我们报告了一种通过采用全息图产生的可变相位梯度曲线来动态创建不对称势井的方法。它的深度，刚度和潜在井的位置可以动态控制。此外，实验证明了纳米颗粒的可控运输，这表明它表现出出色的操纵性能。重要的是，它的运动路径，步进距离和速度可以通过更改全息图轻松操纵，这在可控的纳米颗粒中是非常可取的。这项研究提供了一种用于光学操作的新工具，可以在很大程度上扩大常规光学镊子的能力。
Optical tweezers, which are powerful tools for trapping and manipulating particles, have been widely used in many areas. However, their potential wells are typically symmetrical, which limit their capability of optical trapping and manipulation. Herein, we report an approach for dynamically creating asymmetrical potential wells, by employing variable phase gradient profiles generated by holograms. Its depth, stiffness and location of potential wells can be dynamically controlled. Moreover, the controllable transport of nanoparticle is experimentally demonstrated, which reveals that it exhibits excellent manipulation performance. Importantly, its motion path, step distance and velocity can be easily manipulated by changing its holograms, which is highly desirable in controllable transport of nanoparticles. This study offers a new tool for optical manipulation, which could largely expand the capability of conventional optical tweezers.
