物质波在粗糙镜面上的镜面反射
Specular reflection of matter waves from a rough mirror
摘要：
我们利用速度选择拉曼跃迁对原子在倏逝波镜上反射的镜面性进行了高分辨率的研究。我们已经观察到反射后的速度分布的双重结构：一个符合镜面反射的峰值和一个漫反射基座，其贡献随着失谐量的增加而迅速减小。漫反射是由于两种不同的效应：倏逝波中的自发发射和振幅小于反射原子的德布罗意波长的倏逝波势中的粗糙度。
英文摘要：
We have made a high resolution study of the specularity of the atomic reflection from an evanescent wave mirror using velocity selective Raman transitions. We have observed a double structure in the velocity distribution after reflection: a peak consistent with specular reflection and a diffuse reflection pedestal, whose contribution decreases rapidly with increasing detuning. The diffuse reflection is due to two distinct effects: spontaneous emission in the evanescent wave and a roughness in the evanescent wave potential whose amplitude is smaller than the de Broglie wavelength of the reflected atoms.
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