Topological resonant cavity based on gyromagnetic material

Abstract

The invention discloses a topological resonant cavity based on a gyromagnetic material. The topological resonant cavity is formed by a closed array formed by gyromagnetic materials, wherein the gyromagnetic material array has geometrical structure variability, and is typically an annular array; the gyromagnetic material array comprises a base material with through holes and a ferrite column; the size of the cross section of the ferrite column on the boundary of one side of the gyromagnetic material array is different from, typically smaller than, that of other ferrite columns. According to thetopological resonant cavity, the echo wall mode resonance of unidirectional traveling wave transmission can be realized. If a certain ferrite column on the boundary of one side is removed or a metalsheet is inserted on the boundary, the resonance characteristic of unidirectional transmission cannot be changed.

Description

technical field [0001] The invention belongs to the technical field of photonic crystal resonators, and in particular relates to a topology resonator which utilizes an adjustable gyromagnetic material to realize unidirectional traveling wave transmission of a beam. Background technique [0002] Many research results have used isotropic dielectric materials to realize the design of photonic crystal resonators. The energy transmitted in this type of structure is a standing wave mode, which is not robust to structural defects. Ferrite material is the first major medium in which electromagnetic unidirectional edge states with quantum Hall-like effects have been experimentally verified. Later, some scholars used ferrite to realize the unidirectional resonant cavity, but in this structure, it is necessary to use a confinement layer such as a dielectric photonic crystal to limit the energy radiation of the gyromagnetic material array, so as to obtain the resonance effect, the fabri...

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Problems solved by technology

Later, some scholars used ferrite to realize a unidirectional resonant cavity, but in this structure, it is necessary to use a confinement layer such as a dielectric photonic crystal to limit the radiation of the energy of the gyromagnetic material array, so as to obtain the resonance effect, the fabrication is complicated, and the geometric structure of the resonant cavity is general. For specific structures such as triangles, squares, hexagons, etc.

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