Generation and characteristics of a nano-scale controllable dual-light vortex

Abstract

In this paper, the vector vortex field of a tightly focusing system with a high numerical aperture is adjusted, and a nano-scale controllable dual-light vortex is obtained. At the same time, the topological charge m , parameter β , and phase parameter ν at the focal plane are changed by numerical simulation, and the focusing characteristics of the nano-scale controllable dual-light vortex are deeply studied, including the movement of the dual-light vortex and the energy flow. We also study the transmission characteristics in the z axis, and the results are consistent with the focusing characteristics. To analyze the manipulation ability of the two-light vortex, the corresponding gradient force distribution is calculated. At present, most research on vortex beams focuses on their topological charges on light intensity and beam shaping. There is a lack of in-depth research on nano-scale vortex beam regulation of tight focus systems under high numerical apertures. This paper innovatively modulates the nano-scale controllable dual-light vortex, which has extremely important application significance in the fields of optical communication, optical micromanipulation (high-precision manipulation), and rotation detection.