Forbes Kayn A, Andrews David L
Opt Lett. 2018 Feb 1;43(3):435-438. doi: 10.1364/OL.43.000435.
The question of how the orbital angular momentum of structured light might engage with chiral matter is a topic of resurgent interest. By taking account of electric quadrupole transition moments, it is shown that the handedness of the beam can indeed be exhibited in local chiral effects, being dependent on the sign of the topological charge. In the specific case of absorption, a significant interplay of wavefront structure and polarization is resolved, and clear differences in behavior are identified for systems possessing a degree of orientational order and for those that are randomly oriented.
结构化光的轨道角动量如何与手性物质相互作用的问题是一个重新引起人们兴趣的话题。通过考虑电四极跃迁矩，研究表明光束的手性确实可以在局部手性效应中表现出来，这取决于拓扑电荷的符号。在吸收的特定情况下，波前结构和偏振之间存在显著的相互作用，并且对于具有一定取向有序度的系统和随机取向的系统，其行为存在明显差异。
