New generation scheme of optical knots and links based on polarization of light field and its application

Knots and links have attracted widespread attention in the studies and applications of modern optics. Existing optical studies indicate that because of their complex topological structures, knots and links have problems of line disconnection and self-crosstalk during the fabrication process, which limit their development in optical applications. To solve these problems, we propose a novel split-and-merge method to fabricate knots and links, which can generate continuous lines without interference. Both theoretical simulations and experimental results demonstrate that the proposed method is feasible and effective in theory and practice. On this basis, we combined this method with topological holographic encryption. By splitting the topological knot or link structure that carries information, we improved the quality of optical knot and link preparation and the security of information encryption, and further promoted the development of knots and links in the fields of information encryption, optical storage, and optical communications.