Molybdenum disulfide-based broadband adjustable terahertz wave absorber and method thereof

A technology of molybdenum disulfide and single-layer molybdenum disulfide, which is applied in the field of terahertz frequency band absorption, can solve the problems of inability to achieve broadband absorption, and achieve the effects of simple structure, extremely wide absorption bandwidth, and insensitivity to incident angle and polarization

Pending Publication Date: 2022-04-12
FUZHOU UNIV
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Problems solved by technology

However, once the structural parameters are specified in the design, the absorbing performance of the terahertz absorber has been determined, and generally cannot achieve broadband absorption

Method used

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  • Molybdenum disulfide-based broadband adjustable terahertz wave absorber and method thereof
  • Molybdenum disulfide-based broadband adjustable terahertz wave absorber and method thereof
  • Molybdenum disulfide-based broadband adjustable terahertz wave absorber and method thereof

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Embodiment

[0037] Such as figure 1 , figure 2 As shown, the broadband tunable terahertz absorber based on molybdenum disulfide includes a patterned molybdenum disulfide array layer 1, an intermediate dielectric layer 2, and a metal layer 3 in sequence from top to bottom. A patterned molybdenum disulfide array 1 using electrostatic doping is pasted above a 26 μm thick intermediate dielectric layer 2 made of TOPAS material, and a 0.2 μm metal layer 3 is covered under the dielectric layer as a substrate, so as to This constitutes the terahertz absorber to realize the function of broadband adjustable absorbing. As shown in the figure, the patterned molybdenum disulfide array layer 1 is composed of a plurality of molybdenum disulfide units in a circular pattern and a cross pattern arranged periodically, and the period of the arrangement is p x = p y = 60 μm; the outer diameter of the ring pattern is r 1 = 20 μm with an inner diameter of r 2 = 16 μm; the long side of the cross pa...

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Abstract

The invention provides a broadband adjustable terahertz wave absorber based on molybdenum disulfide and a method thereof. The wave absorber is sequentially provided with a molybdenum disulfide array layer, an intermediate dielectric layer and a metal layer from top to bottom, the molybdenum disulfide array layer is composed of a plurality of molybdenum disulfide units which are periodically arranged according to a regular pattern, shows the metalloid property of molybdenum disulfide under high carrier concentration, and has high absorptivity for incident terahertz waves in a specific frequency band; according to the terahertz wave absorber, the two-dimensional material is used for replacing a traditional metal metasurface wave absorber design, broadband adjustable absorption of terahertz waves is achieved, the structure is simple, the modulation function is excellent, the absorption bandwidth is extremely wide, and the terahertz wave absorber is not sensitive to the incident angle and polarization.

Description

technical field [0001] The invention relates to the field of wave absorption in the terahertz frequency band, in particular to a molybdenum disulfide-based broadband adjustable terahertz wave absorber and a method thereof. Background technique [0002] Terahertz (THz) waves are electromagnetic waves with a frequency range between 0.1 and 10 THz. With the continuous development of emerging terahertz science and technology, new applications including broadband communication, radar detection, medical imaging, non-destructive testing, security inspection, etc. have been extended. Since the terahertz frequency band contains richer frequency information and can be used to detect smaller targets, it is particularly important to develop absorbers dedicated to absorbing terahertz waves. [0003] Molybdenum disulfide is a transition metal disulfide commonly found in natural molybdenite. Through simple mechanical exfoliation, a single-layer molybdenum disulfide two-dimensional structu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01Q17/00G02B5/00
Inventor 黄异钟宇杰钟舜聪林廷玲曾秋铭
Owner FUZHOU UNIV
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