Optomechanical systems are suitable for elucidating quantum phenomena at the macroscopic scale in the sense of the mass scale. The systems should be well isolated from the environment to avoid classical noises, which conceal quantum signals. Optical levitation is a promising way to isolate optomechanical systems from the environment. To realize optical levitation, all degrees of freedom need to be trapped. Until now, longitudinal trapping and rotational trapping of a mirror with optical radiation pressure have been studied in detail and validated with various experiments. However, less attention has been paid to the transversal trapping of a mirror. Herein, we report a pioneering result where we experimentally confirmed transversal trapping of a mirror of a Fabry-Pérot cavity using a torsional pendulum. Through this demonstration, we experimentally proved that optical levitation is realizable with only two Fabry-Pérot cavities that are aligned vertically. This work paves the way toward optical levitation and realizing a macroscopic quantum system.

中文翻译：

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光学悬浮镜的横向运动的光学捕获

光机械系统适合于从质量尺度的角度阐明宏观尺度的量子现象。系统应与环境良好隔离，以避免经典噪声掩盖量子信号。光学悬浮是一种将光机械系统与环境隔离的有前途的方法。为了实现光学悬浮，需要捕获所有自由度。迄今为止，已经详细研究了具有光辐射压力的反射镜的纵向陷波和旋转陷波，并通过各种实验进行了验证。然而，对镜子的横向陷印的关注较少。在这里，我们报道了一个开创性的结果，我们在实验中证实了使用扭摆对法布里-珀罗腔的反射镜进行横向陷波。通过这个演示，我们通过实验证明，只有两个垂直排列的Fabry-Pérot腔体才能实现光学悬浮。这项工作为光学悬浮和实现宏观量子系统铺平了道路。