Brownian ratchet has emerged as a promising tool for deeply understanding motion mechanism of molecules and proteins, and dynamically manipulating particles in non-equilibrium thermodynamics state. Here, we propose and experimentally demonstrate a new type of optical Brownian ratchet, as generated by controllable phase profiles in holographic optical trapping system. The potential energy profiles are dynamically switched in on-off mode, by using Labview software. Experimental results show that not only high speed but also large step distance can be easily achieved in Brownian ratchet, in which the average velocity of forward motion is around 28 μm/s and step distance is about 42 μm. Importantly, the velocity, step distance and motion path can be easily adjusted by manipulating the holograms, which exhibit high flexibility, easy control and excellent capability. This study provides a new way to explore non-equilibrium dynamics at the nanoscale level, and create novel functions in nanoparticle manipulation.

布朗棘轮已成为一种有前途的工具，可用于深入了解分子和蛋白质的运动机理，并在非平衡热力学状态下动态操纵颗粒。在这里，我们提出并通过实验证明了一种新型的光学布朗棘轮，它是由全息光阱系统中的可控相位剖面产生的。通过使用Labview软件，可以在开/关模式下动态切换势能曲线。实验结果表明，在布朗棘轮中，不仅向前运动的平均速度约为28μm/ s，而且步距约为42μm，在布朗棘轮中不仅可以实现很高的步距，而且还可以实现较大的步距。重要的是，通过操作具有高灵活性的全息图，可以轻松调整速度，步距和运动路径，易于控制，性能卓越。这项研究提供了一种新的途径来探索纳米级的非平衡动力学，并在纳米粒子的操纵中创建新的功能。