Structured light interference due to multiple reflections in a spiral phase plate device and its propagation

摘要

When light travels through a spiral phase plate (SPP) device, it acquires structured wavefronts, i.e. a vortex containing orbital angular momentum. For an SPP device, which has a surface reflectivity, there will be multiple reflections in the device causing an azimuthal interference pattern. In this paper, the propagation of structured light is discussed after it has undergone multiple reflections in an SPP device under the thick-plate approximation.