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Tunable metamaterial absorber based on phase-change materials

A phase change material and absorber technology, which can be used in instruments, nonlinear optics, optics, etc., to solve the problems of the difficulty of metamaterial absorbers and increase the structural complexity of metamaterial absorbers.

Active Publication Date: 2012-10-03
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the above-mentioned tunable metamaterial absorber needs to introduce additional adjustable devices, which will increase the complexity of the metamaterial absorber structure
Liquid crystals are fluid and corrosive, which will bring great difficulties to the practical application of metamaterial absorbers.

Method used

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  • Tunable metamaterial absorber based on phase-change materials
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  • Tunable metamaterial absorber based on phase-change materials

Examples

Experimental program
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Effect test

Embodiment 1

[0021] First, a multilayer structure (metal layer 3-phase change material layer 4-metal layer 3-oxidation layer 5) 2 is formed on a glass substrate 1 by a material growth process, as shown in the attached figure 2 (a) shown.

[0022] Second, deposit SiO on the multilayer structure 2 2 film as a mask 6, as attached figure 2 (b) shown.

[0023] Then, the designed periodic hole matrix sample is transferred to the mask through the mask process, as shown in the attached figure 2 (c) shown. Among them, the structure design can adopt algorithms such as finite time domain difference method and finite element method.

[0024] Then, through an etching process, a periodic hole matrix 7 is prepared on the top metal layer 3, as shown in the attached figure 2 as shown in (d)

[0025] Finally, the mask 6 is removed to obtain a tunable metamaterial absorber 8, as shown in the attached figure 2 (e) shown.

Embodiment 2

[0027] First, a multilayer structure of N (N>=1) layers (metal layer 3-phase change material layer 4-metal layer 3-oxidation layer 5) 2 is formed on a glass substrate 1 by a material growth process, as shown in the attached image 3 (a) shown.

[0028] Second, deposit SiO on the multilayer structure 2 2 film as a mask 6, as attached image 3 (b) shown.

[0029] Then, the designed periodic hole matrix sample is transferred to the mask through the mask process, as shown in the attached image 3 (c) shown. Among them, the structure design can adopt algorithms such as finite time domain difference method and finite element method.

[0030] Then, through an etching process, a periodic hole matrix 7 is prepared on the top metal layer 3, as shown in the attached image 3 as shown in (d)

[0031] Finally, remove the mask 6, inject a phase change material 4 into the hole matrix 7 to seal the holes, and obtain a tunable metamaterial absorber 8, as shown in the attached image 3 (...

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Abstract

The invention provides a tunable metamaterial absorber based on a phase-change material. The phase-change material is induced into a metamaterial based on multilayer structures to enable a working band which absorbs spectra to have a tunability so as to solve the technical problem that the absorber is narrow in spectrum absorption range. According to the tunable metamaterial absorber based on the phase-change material, by means of the characteristic that the dielectric coefficient of the phase-change material changes with the changes of an additional electric field or a temperature, the tunability for the absorber to absorb the spectra is achieved, and the maximum amplitude of accommodation can reach 900 nm.

Description

technical field [0001] The invention relates to a tunable metamaterial absorber (Metamaterial Absorber) based on a phase-change material (GST), which can be applied to fields such as photoelectric switches, solar cells, and gas measurements. Background technique [0002] The singular electromagnetic properties of metamaterials can break through the physical limits of traditional media and realize many novel functions, for example, break through the wavelength limit of existing lenses and realize "perfect lenses" with sub-wavelength imaging characteristics; they can also effectively guide electromagnetic waves transmission path, to achieve true electromagnetic stealth. In particular, absorbers based on metamaterials have been proved to be good at absorbing the energy of incident electromagnetic waves, and thus have received extensive attention from researchers. However, this research field is also facing new challenges at the same time. For example, the absorption efficiency...

Claims

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Application Information

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IPC IPC(8): G02F1/17
Inventor 曹暾
Owner DALIAN UNIV OF TECH
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