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A multilayer asymmetric metamaterial based on phase-change materials or topological insulating materials

A technology of topological insulation and phase change materials, which is used in electrical components, antennas, etc.

Active Publication Date: 2016-03-02
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Aiming at the above-mentioned problem of tunable Fano resonance, the present invention provides a multi-layer asymmetric metamaterial based on phase change material or topological insulating material. The device has the characteristics of simple structure, easy operation, and large operating frequency tuning range.

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  • A multilayer asymmetric metamaterial based on phase-change materials or topological insulating materials
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  • A multilayer asymmetric metamaterial based on phase-change materials or topological insulating materials

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example 1

[0019] First, an N (N>=1) layer multilayer structure (metal layer 3-phase change material or topological insulating material layer 4-metal layer 3-oxidation layer 5) 2 is formed on the glass substrate 1 by a material growth process, such as attached figure 2 (a) shown.

[0020] Second, deposit SiO on the multilayer structure 2 2 film as a mask 6, as attached figure 2 (b) shown.

[0021] Then, the designed resonant cell array 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.

[0022] Then, through an etching process, the resonant unit array 7 is prepared on the 2 materials, and the resonant unit deviates from its central position while penetrating the lower metal layer-phase-change material or topological insulating material layer-upper metal layer-oxidation layer, as shown in the attached figure 2 (d...

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Abstract

The invention provides a multilayer asymmetric metamaterial based on a phase-change material or a topological insulating material. The phase-change material or the topological insulating material is introduced into the multi-layer asymmetric metamaterial, and the Fano resonant frequency is tunable, so that the technical problem that the Fano resonant frequency cannot be changed after determination of the metamaterial structure is solved. The characteristic that the dielectric coefficient of the phase-change material or the topological insulating material changes along with the change of an extra electric field or the temperature is used in the invention, so that the tunability function of the Fano resonant frequency in the multilayer asymmetric metamaterial is realized, and the maximum adjusting amplitude can be up to 43 percent.

Description

technical field [0001] The invention relates to a multi-layer asymmetric metamaterial with tunable Fano resonance phenomenon based on a phase change material or a topological insulating material, which can be applied to the fields of slow light, sensing, nonlinearity, optical switch and the like. Background technique [0002] In 2001, Document 1: "R.A. Shelbyetal, SCIENCE, 2001(292): 77" was the first to experimentally report artificial electromagnetic metamaterials with negative refractive index in the microwave range. Since then, artificial electromagnetic metamaterials have attracted widespread attention. With the deepening of research on metamaterials, the phenomenon of Fano resonance on metamaterials has also attracted much attention. In 2007, Document 2: "V.A. Fedotoveetal, PHYSICAL REVIEWLETTER, 2007 (99): 147701" found Fano resonance in an asymmetric resonant ring array for the first time. However, once the structure of the metamaterial is determined, the Fano reson...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01Q15/00
Inventor 曹暾
Owner DALIAN UNIV OF TECH