标题： 弹性与非弹性倏逝波镜用于冷原子 显示英文标题

标题： Elastic and Inelastic Evanescent-Wave Mirrors for Cold Atoms

摘要： 我们报告了关于冷 $^{87}$Rb 原子的倏逝波镜的实验。 测量反弹比例显示了范德华吸引力对表面的重要性。 我们直接观察到了平行于表面的辐射压，该辐射压由倏逝波镜作用在原子上。 我们通过成像原子云在反弹后的运动来分析辐射压。 光子反冲次数范围从2到31。 这与激光功率无关，与失谐成反比，并与倏逝波衰减长度成正比。 通过在开放跃迁上操作镜子，我们也观察到了由于自发拉曼跃迁而发生非弹性反弹的原子。 观察到的分布包括一个在最小速度处的密集峰和一个较慢原子的长尾，这表明该跃迁是一个随机过程，并且在反弹的转折点附近有很强的偏好。 显示英文摘要

摘要： We report on experiments on an evanescent-wave mirror for cold $^{87}$Rb atoms. Measurements of the bouncing fraction show the importance of the Van der Waals attraction to the surface. We have directly observed radiation pressure parallel to the surface, exerted on the atoms by the evanescent-wave mirror. We analyze the radiation pressure by imaging the motion of the atom cloud after the bounce. The number of photon recoils ranges from 2 to 31. This is independent of laser power, inversely proportional to the detuning and proportional to the evanescent-wave decay length. By operating the mirror on an open transition, we have also observed atoms that bounce inelastically due to a spontaneous Raman transition. The observed distributions consist of a dense peak at the minimum velocity and a long tail of faster atoms, showing that the transition is a stochastic process with a strong preference to occur near the turning point of the bounce.