Bordo V G, Loerke J, Rubahn H G
Fysisk Institut, Odense Universitet, Denmark.
Phys Rev Lett. 2001 Feb 19;86(8):1490-3. doi: 10.1103/PhysRevLett.86.1490.
A novel type of laser spectroscopy for the investigation of the collisional dynamics of atoms in the close vicinity of a surface has been developed. The technique utilizes excitation of the vapor atoms in two crossed laser fields, one of which is directed normally to the surface, whereas the other one excites an evanescent wave propagating along the surface. The results, obtained for sodium atoms near a dielectric prism surface, are quantitatively reproduced by a rigorous theoretical approach. This new, nonintrusive method allows one to distinguish by pure optical means between different groups of atoms and to extract their two-dimensional velocity distributions.
一种用于研究表面附近原子碰撞动力学的新型激光光谱技术已被开发出来。该技术利用在两个交叉激光场中对气相原子的激发，其中一个激光场垂直指向表面，而另一个激光场激发沿表面传播的倏逝波。通过严格的理论方法定量再现了在介电棱镜表面附近对钠原子获得的结果。这种新的非侵入性方法允许通过纯光学手段区分不同组的原子，并提取它们的二维速度分布。
