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Infrared waveband ultra-material based on dendritic structure

An infrared band, dendritic technology, applied in the field of flat sandwich type metamaterials, can solve problems such as the difficulty of the split resonator ring structure

Inactive Publication Date: 2008-06-25
NORTHWESTERN POLYTECHNICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Especially when the study of left-handed materials enters the near-infrared and visible light bands, this issue will become particularly important, because no matter whether physical etching or chemical methods are used, it is necessary to prepare periodic aperture resonances with nanometer dimensions as part of left-handed materials. Ring (SRRs) structures will become extremely difficult

Method used

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  • Infrared waveband ultra-material based on dendritic structure
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preparation example Construction

[0011] 1. Preparation of electrolyte: The preparation of copper dendritic structure uses a mixed solution of copper sulfate and sulfuric acid, and weighs different masses of CuSO 4 ·5H 2 O and concentrated H 2 SO 4 Dissolve in a certain amount of water, fully stir to dissolve, and get a blue transparent solution for use; the preparation of the silver particle film adopts the mixed solution of silver nitrate and polyethylene glycol-400 (PEG-400), and weigh different amounts of 1.18mMAgNO 3 and PEG-400:H 2 O=1:9 (v / v) was dissolved in a certain amount of water, stirred thoroughly to dissolve, and a colorless transparent solution was obtained for use.

[0012] 2. Preparation of electrodes: in the preparation process of copper dendritic structure, the anode is a traditional ring-shaped copper electrode. According to the size of the inner diameter of the petri dish used in the experiment, ring-shaped copper electrodes with different diameters are used, and the cathode adopts a ...

Embodiment 1

[0016] Example 1: The electrolyte used is 0.1M CuSO 4 ·5H 2 O and 1.0M H 2 SO 4 Add the electrolyte solution to the electrolytic cell, so that the amount of the added electrolyte solution is limited to just cover the cover glass placed in the electrolytic cell, the anode is a ring-shaped copper electrode, and the cathode is a carbon fiber electrode. Adjust the voltage of the DC stabilized power supply to 10V, turn on the loop to start electrodeposition, and the current in the loop is about 1.0mA. The electrodeposition time was controlled for 2 hours to obtain a copper dendritic structure material with an effective size of 4.0 mm. Optical micrographs and scanning electron micrographs of the samples are attached figure 1 shown. The infrared transmission spectrum measurement of the sample is carried out on the FT / IR-470Plus Fourier transform infrared spectrometer (the spot diameter is 4.0mm), and the measurement results are shown in the attached figure 2 a.

Embodiment 2

[0017] Embodiment two: the electrolyte used is 1.18mMAgNO 3 and PEG-400:H 2 A mixed solution of O=1:9 (v / v), the electrolyte is added to the electrolytic cell, and the metal silver sheet anode and the cut ITO conductive glass are inserted into the electrode pool, so that the conductive surface of the ITO conductive glass and the metallic silver The slices are strictly corresponding, and the distance between them is kept at about 5.0cm. The entire electrodeposition system is placed in an ice-water bath, so as to keep the temperature of the electrolyte in the electrolytic cell not higher than 5°C during the entire electrodeposition process, and use a magnetic stirrer to evenly stir the electrolyte during the entire electrodeposition process. Adjust the voltage of the DC stabilized power supply to 1.5V, connect the loop to start electrodeposition, and the current in the loop is about 0.6mA. The time of electrodeposition is controlled at about 30 minutes, and the thin film of me...

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Abstract

The present invention relates to an infrared wave band meta material based on a dendritic structure, in particular to a flat plate sandwich type meta material formed by combining a metallic copper dendritic structure with a metallic silver granular film. The metallic copper dendritic structure and the silver granular film forming the meta material are obtained both by adopting the chemical electrodeposition method. The present invention uses the quasi-periodic metallic copper dendritic structure comprising a hexagonal split ring resonator structure to realize the magnetic resonance response of infrared wave band; the metallic silver granular film realizes negative dielectric constant on a corresponding infrared wave band, ensuring that the meta material formed by the combination of the metallic copper dendritic structure and the metallic silver granular film shows left-handed material characteristic response on the infrared wave band.

Description

technical field [0001] The invention relates to an infrared band metamaterial based on a dendritic structure, in particular to a flat sandwich metamaterial composed of a metal copper dendritic structure and a metal silver particle film, which can realize left-handed characteristics in the infrared band Response with planar focusing effect. Background technique [0002] Left-handed Metamaterials (LHMs) have attracted extensive attention from scientists in recent years because of their unique electromagnetic response properties. In the past ten years, left-handed materials have developed from the basic theory to the realization of wavelength-band left-handed materials and tentative research on infrared and visible light-band left-handed materials. However, all the studies so far are based on periodic structures, and there are few literature reports on the use of non-periodic structures to achieve left-handed properties. The question scientists faced, therefore, was whether t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/355G02F1/35C25D5/00C25D5/10C25D5/54
Inventor 赵晓鹏刘辉
Owner NORTHWESTERN POLYTECHNICAL UNIV
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