Wang Yangyundou, Schouten Hugo F, Visser Taco D
Opt Lett. 2015 Oct 15;40(20):4779-82. doi: 10.1364/OL.40.004779.
We demonstrate that a J0-Bessel-correlated beam that is incident on a homogeneous sphere produces a highly unusual distribution of the scattered field, with the maximum no longer occurring in the forward direction. Such a beam can be easily generated using a spatially incoherent, annular source. Moreover, the direction of maximal scattering can be shifted by changing the spatial coherence length. In this process, the total power that is scattered remains constant. This new tool to control scattering directionality may be used to steer the scattered field away from the forward direction and selectively address detectors situated at different angles.
我们证明，入射到均匀球体上的J0贝塞尔相关光束会产生非常不寻常的散射场分布，其最大值不再出现在向前方向。使用空间非相干环形源可以很容易地产生这样的光束。此外，通过改变空间相干长度可以改变最大散射方向。在此过程中，散射的总功率保持不变。这种控制散射方向性的新工具可用于将散射场引导至远离向前方向，并选择性地对准位于不同角度的探测器。
