Publications by authors named "Yongxi Zeng"
Optical skyrmions, which are topological quasi-particles with nontrivial electromagnetic textures, have garnered escalating research interest recently for their potential in diverse applications. In this paper, we present a method for generating tightly focused optical skyrmion and meron topologies formed by electric-field vectors under 4-focusing system, where both the topology types (including Néel-, Bloch-, intermediate- and anti-skyrmion/meron) and the normal direction of the two-dimensional topology projection plane can be tailored at will. By utilizing time-reversal techniques, we analytically derive the radiation pattern of a multiple concentric-ring array of dipoles (MCAD) to obtain the required illumination fields on the pupil planes of the two high numerical aperture lenses.
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- The study introduces a method to control the orientation and topological charge of orbital angular momentum (OAM) in optical vortices using a specialized 4π focusing system.
- This involves creating a continuous wave illumination by combining the pattern of a single dipole with a spiral phase factor.
- The ability to manipulate OAM is shown to be achievable by adjusting the dipole's oscillation and the spiral phase, with potential applications in areas like optical trapping and light-matter interactions.
Article Synopsis
- * The absorber performs well at high temperatures due to the materials' high melting point and features a simpler structure compared to traditional metal-based absorbers.
- * It offers an average absorption rate of 94.3% under AM 1.5 solar spectrum light, is not affected by light polarization, and boasts advantages like low cost and ease of production.