Construction of special multi-mode annular optical vortex

Abstract

Based on the vector diffraction theory, this paper modulates the tightly focused Bessel beam, constructs the vector optical vortex field of nanoscale and studies its energy transfer characteristics. The results show that the topological charge number can adjust the polarization state of the optical vortex, and the phenomenon of multimodal optical vortex soliton appears. The phase parameter can cause the optical vortex to be angularly deflected and a certain amount of energy transfer occurs. The ratio of pupil radius to beam waist results in significant energy migration of the multi-ring optical vortex solitons. In a word, the three parameters proposed in this paper can change the dimension of optical vortex solitons and give rise to a new form of optical vortex. The research in this paper has a good application prospect in the fields of optical vortex manipulation, particle capture and multiplexing of high density communication system, information security and so on.