论文标题
通过光线拉并提起宏观物体
Pulling and lifting macroscopic objects by light
论文作者
论文摘要
激光已成为通过辐射压力或光性力量操纵微粒子和原子的强大工具，但是对于大物体而言，光学操纵不太明显。已经提出并证明了光学诱导的负力长距离，但对于宏观物体而言几乎没有看到。在这里，我们报告了对异常光引起的吸引力的直接观察，这些力允许通过光束拉出和提起厘米大小的光吸收物体。这种负力基于对弯曲叶片的辐射效应，其幅度和时间响应是通过摆的直接测量的。这种大力（\ 〜4.4μn）允许克服引力力，并用四弯曲的叶片（最高600 rpm）旋转电动机。宏观物体的光学拉力可能会发现太阳能驱动的近距离推进系统的非平凡应用以及理解负面照射力的机制。
Laser has become a powerful tool to manipulate micro-particles and atoms by radiation pressure force or photophoretic force, but optical manipulation is less noticeable for large objects. Optically-induced negative forces have been proposed and demonstrated to pull microscopic objects for a long distance, but are hardly seen for macroscopic objects. Here, we report the direct observation of unusual light-induced attractive forces that allow pulling and lifting centimeter-sized light-absorbing objects off the ground by a light beam. This negative force is based on the radiometric effect on a curved vane and its magnitude and temporal responses are directly measured with a pendulum. This large force (\~4.4 μN) allows overcoming the gravitational force and rotating a motor with four-curved vanes (up to 600 rpm). Optical pulling of macroscopic objects may find nontrivial applications for solar radiation-powered near-space propulsion systems and for understanding the mechanisms of negative photophoretic forces.
