Optical spin-orbit interactions in molecular scattering of twisted light

摘要

The unique role that electric quadrupole transition moments can play in chiroptical interactions has recently beenestablished with twisted light beams. Manifesting a spin-orbit interaction in paraxial light, the engagement of electricquadrupoles in electronic transitions is highlighted in optical phenomena such as absorption, in both chiral and achiralmedia. However, spin-orbit interactions of light are also well-known in scattering from small particles, and recentexploratory experimental work suggests a chiroptical interaction of this nature in the scattering of optical vortex beams.Using a quantum electrodynamical formulation, such a sensitivity to the handedness of a vortex beam is accounted for inmolecular scattering processes.