Single-band and three-band switchable filter based on vanadium dioxide phase change metamaterial

A technology of vanadium dioxide and metamaterial, which is applied in the field of terahertz filters, can solve the problems of restricting the application of filters, high cost, non-adjustable absorption function, etc., and achieves the effects of novel control method, low cost, and simple and compact structure.

Active Publication Date: 2020-02-07
CHINA JILIANG UNIV
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Problems solved by technology

[0003] The terahertz filters currently researched at home and abroad mainly realize the absorption of terahertz waves by designing metal microstructures with different geometric shapes and size parameters. Once the absorption function of the device is determined, it cannot be adjusted, which restricts the application of the filter. , and the cost is higher

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  • Single-band and three-band switchable filter based on vanadium dioxide phase change metamaterial
  • Single-band and three-band switchable filter based on vanadium dioxide phase change metamaterial
  • Single-band and three-band switchable filter based on vanadium dioxide phase change metamaterial

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Embodiment 1

[0026]In this embodiment, the structures and shapes of the components of the single-band and triple-band switchable filters based on the alumina phase-change metamaterial are as described above, so details are not repeated here. However, the specific parameters of each component are as follows: the material of the outer split resonant ring is gold, the side length of the outer square outline is 160 μm, the side length of the inner square outline is 130 μm, the length of the rectangular opening is 10 μm, the width is 15 μm, and the height of the outer split resonant ring is 0.2 μm and a width of 15 μm. The material of the open U-shaped ring of the inner long branch is gold, the length of the main cuboid of the inner long branch is 120 μm, the width is 10 μm, and the height is 0.2 μm, and the length of the two inner long branch sub-cuboids 11 is 59 μm, the width is 10 μm, and the height is 0.2 μm. 0.2 μm. The material of the first alumina interstitial block and the second alumi...

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Abstract

The invention discloses a single-band and three-band switchable filter based on a vanadium dioxide phase change metamaterial. The filter comprises an outer open resonance ring, an inner long branch open U-shaped ring, a first vanadium dioxide gap block body, a second vanadium dioxide gap block body, an inner short branch open U-shaped ring and a dielectric layer. The outer open resonance ring, theinner long branch open U-shaped ring, a first vanadium dioxide gap, a second vanadium dioxide gap and the inner short branch open U-shaped ring are located on the top layer, and the dielectric layeris located below a resonance ring pattern and the vanadium dioxide gaps. By changing the temperature, the vanadium dioxide material is subjected to phase change to form a metal state, the resonance characteristic of the structural unit is changed, and the switching from a three-passband filter before the phase change of vanadium dioxide to a single-passband filter after the phase change of vanadium dioxide is realized. The single-band and three-band switchable filter based on a vanadium dioxide phase change metamaterial has the advantages of compact structure, low cost, excellent performance and the like, and meets the application requirements of terahertz imaging and terahertz communication systems.

Description

technical field [0001] The invention relates to a terahertz filter, in particular to a single-band and triple-band switchable filter based on an alumina phase-change metamaterial. Background technique [0002] Terahertz generally refers to electromagnetic waves with a frequency of 0.1 to 10 THz, corresponding to a wavelength of 0.03 mm to 3 mm, and its frequency range is located at the intersection of electronics and photonics. In recent years, the terahertz wave between the millimeter wave and infrared light, which has been developed quite maturely on the electromagnetic spectrum, is undoubtedly a brand-new research field, and it has great potential value in all aspects. For a long time, due to the lack of effective terahertz wave generation and detection methods, compared with traditional microwave technology and optical technology, people have little understanding of the nature of electromagnetic radiation in this band, so that this band has become the terahertz wave in t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01P1/203
CPCH01P1/203
Inventor 陈莲娜李九生
Owner CHINA JILIANG UNIV
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