Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

An ultra-broadband absorber based on cascaded metamaterials

A cascade structure and metamaterial technology, applied in the direction of instruments, instrument parts, shielding, etc., can solve the problems of narrow absorption wavelength range, low absorption rate, small incident angle, etc., and achieve easy processing and preparation, lower absorption frequency, The effect of broadening the absorption bandwidth

Inactive Publication Date: 2017-08-08
HARBIN UNIV OF SCI & TECH
View PDF5 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention aims to solve the problems that the existing ultra-broadband absorber has low absorption rate, small incident angle and narrow absorption wavelength range and cannot absorb across multiple bands, and provides an ultra-broadband absorber based on cascaded structure metamaterials

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • An ultra-broadband absorber based on cascaded metamaterials
  • An ultra-broadband absorber based on cascaded metamaterials
  • An ultra-broadband absorber based on cascaded metamaterials

Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment approach 1

[0014] Specific implementation mode one: as figure 1 As shown, an ultra-broadband absorber based on cascaded metamaterials in this embodiment consists of a metal plate substrate 1, a first dielectric layer 2, a first metal layer 3, a second dielectric layer 4, and a second metal layer 5 , the third dielectric layer 6, the third metal layer 7, the fourth dielectric layer 8, the fourth metal layer 9, the fifth dielectric layer 10, the fifth metal layer 11, the sixth dielectric layer 12, the sixth metal layer 13, the The seventh dielectric layer 14, the seventh metal layer 15, the eighth dielectric layer 16, the eighth metal layer 17, the ninth dielectric layer 18 and the ninth metal layer 19; the metal plate substrate 1 is horizontally placed on the bottom layer, in the The center position of the metal plate substrate 1 is arranged in parallel from bottom to top with a first dielectric layer 2, a first metal layer 3, a second dielectric layer 4, a second metal layer 5, a third d...

specific Embodiment approach 2

[0020]Embodiment 2: The difference between this embodiment and Embodiment 1 is: the metal plate substrate 1, the first metal layer 3, the second metal layer 5, the third metal layer 7, the fourth metal layer 9, The materials of the fifth metal layer 11, the sixth metal layer 13, the seventh metal layer 15, the eighth metal layer 17 and the ninth metal layer 19 are all gold, aluminum or copper, and the thickness is 20nm; the metal plate substrate 1 is a square metal plate with a side length of 400 nm. This setting makes the transmittance T(ω) 0, which meets the actual needs. Other steps and parameters are the same as in the first embodiment.

[0021] The thickness of the square metal plate in this embodiment is greater than the skin depth of the incident electromagnetic wave.

[0022] In this embodiment, the formula A(w)=1-R(ω)-T(ω) is used to calculate the absorptivity of the metamaterial absorber, wherein R(ω) is the reflectivity, and T(ω) is the transmittance. In order to ...

specific Embodiment approach 3

[0023] Embodiment 3: This embodiment differs from Embodiment 1 or Embodiment 2 in that: the first dielectric layer 2, the first metal layer 3, the second dielectric layer 4, the second metal layer 5, and the third dielectric layer 6 and the diameter of the bottom surface of the third metal layer 7 is 175 nm. Other steps and parameters are the same as those in Embodiment 1 or 2.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

An ultra-broadband absorber based on cascade-structured metamaterials. The invention relates to an ultra-broadband absorber. The present invention is to solve the problem that the existing ultra-broadband absorber has low absorption rate, small incident angle and narrow absorption wavelength range and cannot absorb across multiple bands. These methods work together to lead to coupling and superposition between units of different sizes, and coupling and superposition between different dielectric constants of the same unit, realizing the ultra-broadband absorption of electromagnetic waves by the metamaterial absorber, and the absorption wavelength range of the absorption rate exceeding 92% is 284~ 1524nm, including some ultraviolet waves, all visible light and some near-infrared waves, and the absorption rate can still reach more than 90% under the condition of incident angle of 40° oblique angle. The invention can be applied in the fields of solar cell absorption, thermal emitters and optoelectronic devices.

Description

technical field [0001] The invention relates to an ultra-broadband absorber. Background technique [0002] Metamaterials are man-made composite electromagnetic materials with extraordinary properties. They have become research hotspots in physics, materials science, engineering and chemistry. The use of electromagnetic metamaterials can achieve arbitrary "tuning" of electromagnetic wave properties, thereby realizing Exotic electromagnetic properties such as negative refractive index, sub-diffraction imaging, and electromagnetic cloaking. In recent years, electromagnetic resonant absorbers based on electromagnetic metamaterials can achieve 100% perfect absorption of electromagnetic waves of a specific frequency incident on the absorber by rationally designing the physical size and material parameters of the device, thus attracting great attention from domestic and foreign academic circles. . Contents of the invention [0003] The invention aims to solve the problems that ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): G12B17/02
Inventor 贺训军颜世桃张秦飞张景云吴丰民姜久兴
Owner HARBIN UNIV OF SCI & TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com