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A new method to improve the directivity of broadband oam

A directional and new method technology, which is applied in the field of new artificial electromagnetic devices, can solve the problems that OAM beams cannot carry out long-distance transmission, and achieve the effect of improving long-distance transmission, improving directivity, and the method is simple and effective

Active Publication Date: 2021-02-19
XIAMEN UNIV +1
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Problems solved by technology

[0003] The purpose of the present invention is to provide a new method for improving the directivity of broadband OAM aiming at problems such as the inability of OAM beams to carry out long-distance transmission in the prior art

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Embodiment Construction

[0055] The following embodiments will further illustrate the present invention in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are only used to explain the present invention, but not to limit the present invention.

[0056] Embodiments of the present invention include the following steps:

[0057] 1) Based on transformation optics, a method of three-dimensional zoom transformation optics is proposed, after the three-dimensional regions before and after transformation are segmented according to the solid angle, and then three-dimensional zoom transformation optics are applied to the corresponding sub-regions obtained from the segmentation;

[0058] (1) Select a transformation origin (generally the center point of the three-dimensional region) in the transformation domains of the virtual space and the physical space respectively, and then divide the two regions before and after the transformation according to th...

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Abstract

A new approach to improve the directivity of broadband OAM involving artificial electromagnetic devices. A method of three-dimensional scaling and transformation optics is proposed. After the three-dimensional regions before and after transformation are segmented according to the solid angle, three-dimensional scaling and transformation optics are applied to the corresponding sub-regions obtained from the segmentation respectively; a cylindrical converging lens is designed, and the The yurt-shaped area is transformed, and the material parameters of the cylindrical converging lens in the physical space are calculated, and when the converging lens works at a single frequency point, the converging effects when the filling material is magnetic and non-magnetic are respectively simulated; it is verified that the converging lens works at Convergence effect on broadband; provide a feasible manufacturing method for the designed converging lens, first divide the converging lens and ensure that the material of each segment is uniform, and then fill the dielectric material to verify the converging characteristics ; The broadband OAM directivity can be improved by placing the converging lens above the antenna array that generates the OAM beam.

Description

technical field [0001] The invention relates to the technical field of novel artificial electromagnetic devices, in particular to a new method for improving the directivity of broadband OAM by using transformation optics. Background technique [0002] Since the Dutch physicist L. Allen discovered in the 1990s that the propagation direction of the non-planar phase wave front of the Laguerre-Gauss (L-G) beam propagates in a spiral shape, the orbital angular momentum (OAM) has caused Extensive research upsurge ([1] L.Allen, M.W.Beijersbergen, R.J.Spreeuw, and J.P.Woerdman, "Orbital angular momentum of light and the transformation of LaguerreGaussianlaser modes," Physical Review A Atomic Molecular & Optical Physics, vol.45, no.11 , pp.8185–8189, 1992.). In recent years, OAM has been widely developed in various applications, including particle control, optical tweezers, and optical data storage ([2] D.G.Grier, "A revolution in optical manipulation," Nature, vol.424, no.6950 , p...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01Q19/06H01Q15/08H01Q21/20G06F30/23
CPCH01Q15/08H01Q19/06H01Q21/20
Inventor 朱春辉谢辰刘利军叶龙芳刘颜回柳清伙
Owner XIAMEN UNIV
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