Terahertz dual-band absorber based on plastic frustum-conical structure
A conical frustum and absorber technology is applied in the field of terahertz absorbers, which can solve the problems of high processing cost, complex structure, restricting the application of absorbers, etc., and achieve the effects of low processing cost, compact structure and excellent performance.
Active Publication Date: 2021-01-26
CHINA JILIANG UNIV
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Problems solved by technology
However, most terahertz absorbers at home and abroad have the characteristics of complex structures and high processing costs, which restrict the application of absorbers.
Method used
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Embodiment 1
[0017] In this embodiment, the structure of a dual-band terahertz absorber based on a plastic truncated cone structure and the shapes of its components are as described above, so details will not be repeated here. The specific parameters of each component are as follows: the bottom surface of the cuboid plastic dielectric substrate is a square, its side length is 140 μm, and its height is 110 μm; the thickness of the bottom metal film and the top metal layer are both 1 μm; the height H of the plastic truncated cone is 190 μm, The distance L between adjacent plastic truncated cone periodic units is 140 μm. Figure 5 The performance curve of the terahertz dual-band absorber with a plastic truncated cone structure. At 2.7THz, the absorber has an absorption rate of 96%; at 3.3THz, the absorber has an absorption rate of 98%. The performance indicators of the terahertz dual-band absorber based on the plastic frustum structure are obtained by simulation with CST software.
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Abstract
The invention discloses a dual-band absorber based on a plastic cone frustum structure. The dual-band absorber comprises N * N plastic cone frustum unit structures, N is a natural number, and each plastic cone frustum unit structure sequentially comprises a bottommost metal film, a cuboid plastic medium base body, a plastic cone frustum and a top metal layer from top to bottom. By changing the heights of the plastic cone frustums and the period of the adjacent plastic cone frustums, the absorber achieves the optimal absorption effect. Simulation results show that the absorber has two absorption frequency points, and the absorptivity reaches 90% or above. The dual-band absorber based on the plastic cone frustum structure has the advantages of being simple in structure, low in cost, excellent in performance and the like, and satisfies the terahertz communication requirement.
Description
technical field [0001] The invention relates to a terahertz absorber, in particular to a terahertz dual-band absorber based on a plastic truncated cone structure. Background technique [0002] Terahertz generally refers to electromagnetic waves with a frequency of 0.1~10THz, and the corresponding wavelength is 0.03mm~3mm. 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 the electromagnetic spectrum. void. With the breakthrough of terahertz radiation source and detection techn...
Claims
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IPC IPC(8): H01Q17/00H05K9/00G02B5/00
CPCG02B5/003H01Q17/00H01Q17/007H01Q17/008H05K9/00
Inventor 李九生张丽娜
Owner CHINA JILIANG UNIV