Savalli V, Stevens D, Estève J, Featonby P D, Josse V, Westbrook N, Westbrook C I, Aspect A
Laboratoire Charles Fabry de l'Institut d'Optique, UMR 8501 du CNRS, 91403 Orsay Cedex, France.
Phys Rev Lett. 2002 Jun 24;88(25 Pt 1):250404. doi: 10.1103/PhysRevLett.88.250404. Epub 2002 Jun 10.
We present a high resolution study of the specularity of the atomic reflection from an evanescent wave mirror using velocity selective Raman transitions. We 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 roughness in the evanescent wave potential whose amplitude is smaller than the de Broglie wavelength of the reflected atoms.
我们利用速度选择性拉曼跃迁对倏逝波光镜的原子反射的镜面反射率进行了高分辨率研究。我们观察到反射后速度分布中的双重结构：一个与镜面反射一致的峰值和一个漫反射平台，其贡献随着失谐增加而迅速减小。漫反射归因于两种不同的效应：倏逝波中的自发发射和倏逝波势中的粗糙度，其幅度小于被反射原子的德布罗意波长。
