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Dynamic tunable absorber based on coherent control

A technology of coherent control and absorber, which is applied in the direction of instruments, instrument parts, shielding, etc., can solve the problems of inability to realize switching of working frequency and dynamic adjustment of absorption rate, etc., and achieve light weight, small thickness and simple production Effect

Inactive Publication Date: 2014-09-03
HARBIN ENG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The above-mentioned perfect absorbers based on new artificial electromagnetic materials cannot realize the dynamic regulation of the absorption rate, and have a fixed working frequency, and cannot realize the switching of the working frequency

Method used

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  • Dynamic tunable absorber based on coherent control
  • Dynamic tunable absorber based on coherent control
  • Dynamic tunable absorber based on coherent control

Examples

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Embodiment 1

[0026] This embodiment consists of figure 1 The shown double-layer split ring structure 2, 3 and substrate 1 are composed of double-layer split rings periodically arranged on both sides of the substrate, the thickness of the substrate is 1.6 mm, the material is PCB, and its dielectric constant ε=4.05-0.05i, The size of each novel artificial electromagnetic material unit is 15 mm × 15 mm. like figure 2 as shown, figure 1 The structure shown is that the split rings on both sides of the base are rotated 180 degrees to each other, and are periodically extended along the X and Y directions to form a double-layer split ring array. The split rings on each side are made of two metal arcs with different lengths. 2 and 3, the material of the metal arc is copper, the corresponding angles are α=140 degrees and β=160 degrees, the inner diameter r=5.6 mm, the outer diameter R=6.4 mm, the thickness t=35 microns, double layer Split rings are periodically etched on both sides of the substr...

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Abstract

The invention belongs to the field of electromagnetic waves and novel artificial electromagnetic materials, and particularly relates to a dynamic tunable absorber based on coherent control and used for perfect electromagnetic wave absorption. The dynamic tunable absorber based on coherent control is composed of a dielectric layer and artificial electromagnetic material layers, wherein the artificial electromagnetic material layers are located on the two sides of the dielectric layer and are both etched on the substrate of the dielectric layer. Each artificial electromagnetic material layer is of an asymmetrical split ring structure where artificial electromagnetic materials are arranged in a periodic or aperiodic mode, wherein the asymmetrical split ring structure is formed by two metal wires or arcs in different lengths. According to the dynamic tunable absorber, operation is easy, the absorption band of the absorber can be adjusted by regulating and controlling the phase of the wave and the structure, dimension parameters and material attribute of the novel artificial electromagnetic material, and then selective absorption of electromagnetic waves in a specific frequency can be achieved. The dynamic tunable absorber also has the advantages of being portable, light, easy to integrate and the like.

Description

technical field [0001] The invention belongs to the field of electromagnetic waves and novel artificial electromagnetic materials, and in particular relates to a dynamically tunable absorber based on coherent control for perfect absorption of electromagnetic waves. Background technique [0002] Absorbing technology is mainly a kind of material that uses absorbing materials to effectively absorb incident electromagnetic waves and make them scatter and attenuate. It converts incident electromagnetic waves into heat energy or other energy forms through various loss mechanisms of materials to achieve the purpose of absorbing electromagnetic waves. Among them, perfect absorbers are widely used in the fields of photodetectors, spectral imaging, and bolometers. The emergence of new artificial electromagnetic materials has enriched the research content in the electromagnetic field, and also provided opportunities for the realization of various new microwave devices and micro-nano de...

Claims

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Application Information

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IPC IPC(8): G12B17/02
Inventor 史金辉聂光宇史全超朱正关春颖
Owner HARBIN ENG UNIV
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