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Tunable left-handed metamaterial based on phase-change material

A technology of phase change materials and metamaterials, applied in the field of tunable negative refractive index devices

Active Publication Date: 2012-10-24
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Aiming at the above-mentioned problems of tunable left-handed metamaterials, the present invention provides a tunable left-handed metamaterial based on phase-change materials. The device has the characteristics of simple structure, easy operation, and large operating frequency tuning range.

Method used

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  • Tunable left-handed metamaterial based on phase-change material
  • Tunable left-handed metamaterial based on phase-change material
  • Tunable left-handed metamaterial based on phase-change material

Examples

Experimental program
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Embodiment 1

[0020] 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 figure 2 (a) shown.

[0021] Second, deposit SiO on the multilayer structure 2 2 film as a mask 6, as attached figure 2 (b) shown.

[0022] 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.

[0023] Then, through an etching process, a periodic hole matrix 7 is prepared on the 2 material, as shown in the attached figure 2 as shown in (d)

[0024] Finally, the mask 6 is removed to obtain the tunable left-handed metamaterial 8, as shown in the attached figure 2 (e) shown. Among them, the left-handed metamaterial 9 based on multi-l...

Embodiment 2

[0026] 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.

[0027] Second, deposit SiO on the multilayer structure 2 2 film as a mask 6, as attached image 3 (b) shown.

[0028] 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.

[0029] Then, through an etching process, a periodic hole matrix 7 is prepared on the 2 material, as shown in the attached image 3 as shown in (d)

[0030] Finally, the mask 6 is removed, and the phase-change material 4 is injected into the hole matrix 7 to seal the holes to obtain a tunable left-handed metamaterial 8, as shown in the attached ...

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Abstract

The invention provides a tunable left-handed metamaterial based on a phase-change material. The phase-change material is introduced into the left-handed metamaterial based on a multi-layer structure, so that a working band with a negative refractive index of the left-handed metamaterial is enabled to have tunability, and the technical problem that the working frequency range of the left-handed metamaterial is narrow is solved. By the characteristic that the dielectric coefficient of the phase-change material is changed along with the change of an external electric field or temperature, the tunable function of the working frequency of the left-handed metamaterial is realized, and the maximum tuning amplitude can reach 43%.

Description

technical field [0001] The invention relates to a tunable negative refractive index device based on a phase change material (GST), which can be applied to the fields of microwave engineering, electromagnetic stealth, medical imaging, negative refractive index lenses and the like. Background technique [0002] The singular electromagnetic properties of left-handed materials can break through the physical limit of traditional media and realize many novel functions, for example, break through the wavelength limit of existing lenses and realize a "perfect lens" with sub-wavelength imaging characteristics; it can also effectively guide the propagation path of electromagnetic waves, The realization of true electromagnetic stealth also faces new challenges. For example, the left-handed metamaterial has a periodic structure, so the working frequency band of its negative refractive index is too narrow. In order to solve these problems, people have made many attempts, thus forming the ...

Claims

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Application Information

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IPC IPC(8): H01Q15/02
Inventor 曹暾
Owner DALIAN UNIV OF TECH
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