| FUNDAMENTAL AREAS OF PHENOMENOLOGY(INCLUDING APPLICATIONS) |
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Optimization of Light Field for Generation of Vortex Knot |
| Song Wang, Lei Wang, Furong Zhang, and Ling-Jun Kong* |
| Key Laboratory of Advanced Optoelectronic Quantum Architecture and Measurements of Ministry of Education, Beijing Key Laboratory of Nanophotonics & Ultrafine Optoelectronic Systems, School of Physics, Beijing Institute of Technology, Beijing 100081, China |
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| Cite this article: |
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Song Wang, Lei Wang, Furong Zhang et al 2022 Chin. Phys. Lett. 39 104101 |
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Abstract The theory of knots and links focuses on the embedding mode of one or several closed curves in three-dimensional Euclidean space. In an electromagnetic field system, all-optical knots or links composed of phase or polarization singularities have been verified theoretically and experimentally. Recent studies have shown that robust topological all-optical coding can be achieved by using optical knots and links. However, in the current design of optical knots and links based on phase or polarization singularities, the amplitude of light between adjacent singularities is relatively weak. This brings great pressure to detection of optical knots and links and limits their applications. Here, we propose a new optimization method in theory. Compared with the existing design methods, our design method improves the relative intensity distribution of light between adjacent singularities. We verify the feasibility of our design results in experiments. Our study reduces the detection difficulty of optical knots and links, and has a positive significance for promotion of applications of optical knots and links.
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Received: 06 August 2022
Published: 29 September 2022
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| PACS: |
41.85.Ew
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(Particle beam profile, beam intensity)
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42.15.Dp
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(Wave fronts and ray tracing)
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42.15.Eq
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(Optical system design)
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03.65.Vf
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(Phases: geometric; dynamic or topological)
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