Aiello Andrea, Lindlein Norbert, Marquardt Christoph, Leuchs Gerd
Max Planck Institute for the Science of Light, Günter-Scharowsky-Strasse 1/Bau 24, 91058 Erlangen, Germany.
Phys Rev Lett. 2009 Sep 4;103(10):100401. doi: 10.1103/PhysRevLett.103.100401. Epub 2009 Aug 31.
We present a novel fundamental phenomenon occurring when a polarized beam of light is observed from a reference frame tilted with respect to the direction of propagation of the beam. This effect has a purely geometric nature and amounts to a polarization-dependent shift or split of the beam intensity distribution evaluated as the time-averaged flux of the Poynting vector across the plane of observation. We demonstrate that such a shift is unavoidable whenever the beam possesses a nonzero transverse angular momentum. This latter result has general validity and applies to arbitrary systems such as, e.g., electronic and atomic beams.
我们展示了一种新的基本现象，该现象发生在从相对于光束传播方向倾斜的参考系中观察偏振光束时。这种效应具有纯粹的几何性质，相当于光束强度分布的偏振相关位移或分裂，该分布被评估为坡印廷矢量在观测平面上的时间平均通量。我们证明，只要光束具有非零横向角动量，这种位移就是不可避免的。后一个结果具有普遍有效性，适用于任意系统，例如电子束和原子束。
