Crystal structure of metamaterials with adjustable electromagnetic wave absorption and preparation method thereof
A crystal structure and electromagnetic wave technology, applied in the field of electromagnetic metamaterials, can solve problems such as the inability to control the absorption characteristics of electromagnetic waves, and achieve the effect of adjusting the absorption coefficient
Active Publication Date: 2021-07-27
SHANGHAI INST OF MICROSYSTEM & INFORMATION TECH CHINESE ACAD OF SCI
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Problems solved by technology
[0005] In view of the shortcomings of the prior art described above, the purpose of the present invention is to provide a metamaterial crystal structure that can regulate electromagnetic wave absorption and its preparation method, which is used to solve the problem that artificial microstructures or metamaterials in the prior art are often only sensitive to specific frequencies. (segment) electromagnetic waves are effective, and it is impossible to flexibly control the electromagnetic wave absorption characteristics of each frequency band effectively.
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[0046] Embodiments of the present invention are described below through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific implementation modes, and various modifications or changes can be made to the details in this specification based on different viewpoints and applications without departing from the spirit of the present invention.
[0047] see Figure 1 to Figure 7. It should be noted that the diagrams provided in this embodiment are only schematically illustrating the basic concept of the present invention, although only the components related to the present invention are shown in the diagrams rather than the number, shape and Dimensional drawing, the shape, quantity and proportion of each component can be changed arbitrarily during actual implementation, and t...
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Abstract
The present invention provides a metamaterial crystal structure capable of regulating electromagnetic wave absorption and a preparation method thereof. The preparation includes: providing a blazed grating substrate, the surface of which is formed with a periodically arranged zigzag array structure, including a first groove surface with a first inclination angle and A second groove surface with a second inclination; an alternating multi-layer film structure is formed on a blazed grating substrate, including several metamaterial structural units, including a first equivalent dielectric constant unit and a second equivalent dielectric constant unit, An electromagnetic wave absorption interface is formed between the two, and the metamaterial crystal structure of the present invention can regulate the absorption of electromagnetic waves as required, by regulating the interface wave vector supported by the metamaterial crystal structure, the material parameters of the multilayer film and the blaze angle of the grating , the characteristic absorption peak of the electromagnetic wave can be precisely adjusted; by adjusting the period P of the metamaterial crystal structure, that is, the grating constant, the absorption coefficient of the electromagnetic wave can be effectively adjusted, and the absorption of electromagnetic waves in different frequency bands can be adjusted without redesigning the metamaterial crystal structure.
Description
technical field [0001] The invention belongs to the technical field of electromagnetic metamaterials, in particular to a metamaterial crystal structure capable of regulating electromagnetic wave absorption and a preparation method thereof. Background technique [0002] At present, with the rapid development of micro-nano processing technology, new artificial microstructures are constantly emerging. Among them, electromagnetic metamaterials are artificial microstructures composed of subwavelength or deep subwavelength electromagnetic response unit arrays. Compared with traditional electromagnetic materials, electromagnetic metamaterials can more flexibly control the transmission of electromagnetic waves and the interaction between electromagnetic waves and matter. For example, the permittivity and permeability of specially designed metamaterials can be negative at the same time, realizing the negative refraction transmission of electromagnetic waves, which is a characteristic...
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IPC IPC(8): G02B5/00G02B1/00
CPCG02B1/002G02B5/003
Inventor 欧欣张师斌林家杰黄浩游天桂黄凯王曦
Owner SHANGHAI INST OF MICROSYSTEM & INFORMATION TECH CHINESE ACAD OF SCI