A terahertz wave absorbing device, wave absorbing unit and manufacturing method thereof
A square, metal resonance technology, applied in the field of electromagnetic wave detection, can solve the problems of insufficient compact structure and increased processing difficulty, and achieve the effects of compact structure, good absorption rate, and widened absorption bandwidth.
Active Publication Date: 2020-10-16
BEIJING UNIV OF POSTS & TELECOMM
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Problems solved by technology
The absorption band can be broadened by superimposing multiple metal resonant units with different structures, but such a structure is usually not compact enough; on the other hand, metal layer 1+dielectric 1+metal patch 1 is formed by placing multiple metal resonant units in different layers +Dielectric 2+Metal patch 2 or more, using multi-layer structure for frequency superposition, can also form broadband absorbing, but this multi-layer structure makes processing more difficult
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[0035] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be described in further detail below in conjunction with specific embodiments and with reference to the accompanying drawings.
[0036] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary only for explaining the present invention and should not be construed as limiting the present invention.
[0037] Those skilled in the art will understand that unless otherwise stated, the singular forms "a", "an", "said" and "the" used herein may also include plural forms. It should be further understood that when an element is referred to as being "connected" or "coupled" to another el...
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Abstract
The invention discloses a terahertz wave absorbing device, a wave absorbing unit and a manufacturing method thereof. the wave absorbing unit comprises a metal resonant structure, a dielectric layer and a bottom metal layer from top to bottom, wherein multiple metal patches arranged in a central symmetrical manner are included in the metal resonant structure; and the metal patch comprises multipleslots with different lengths. Thus, the absorbing bandwidth can be broadened, the structure is compact, the processing is easy, and a good absorbing rate is achieved for electromagnetic waves corresponding to frequencies of adjacent absorbing peaks.
Description
technical field [0001] The invention relates to the technical field of electromagnetic wave detection, in particular to a terahertz wave absorbing device, a wave absorbing unit and a manufacturing method thereof. Background technique [0002] Terahertz (THz) waves usually refer to electromagnetic waves with a frequency of 0.3-3 THz (or a wavelength of 0.1-1 mm), which have important research value and Application prospect. However, because it is difficult for conventional materials to generate electromagnetic responses in the terahertz band, especially magnetic responses, there are few studies on electromagnetic devices in the terahertz band. [0003] In 1968, Russian scientist V.G. Veselago proposed the theory of metamaterials, pointing out that metamaterials with negative permittivity and magnetic permeability can be obtained through rational design, and the materials exhibit electromagnetic properties that conventional materials do not have. In 2000, American scientist ...
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IPC IPC(8): H01Q17/00
CPCH01Q17/00
Inventor 亓丽梅李永龙陈智娇姚远俞俊生
Owner BEIJING UNIV OF POSTS & TELECOMM