All-dielectric terahertz sensor based on metamaterial surface

A sensor and terahertz technology, applied in the direction of instruments, scientific instruments, electric radiation detectors, etc., can solve the problems of affecting the efficiency of sensors, shortening the service life, and high cost, and achieve the effect of low cost, low heat and low cost

Active Publication Date: 2021-11-09
ANHUI UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The traditional sensor is composed of metal and dielectric, and its cost is high. Since its working band is tens to hundreds of megahertz, it requires a lot of power and generates extremely high heat, which may have a great impact on the surrounding adjacent devices. The impact of the sensor affects the efficiency of the sensor, which in turn leads to a shorter service life of the entire product

Method used

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  • All-dielectric terahertz sensor based on metamaterial surface
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  • All-dielectric terahertz sensor based on metamaterial surface

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Embodiment Construction

[0028] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0029] The all-dielectric sensor involved in the present invention is based on a single resonant unit to achieve the required absorbing performance, that is to say, the metamaterial all-dielectric absorbing sensor only includes one absorbing resonant unit, such as figure 1 As shown, the material used is Si3N4, which is doped with a conductive material so that it has a certain conductivity. When the electromagnetic wave is directly incident on the surface of the unit, the absorbed electromagnetic wave generates electromagnetic heat through dielectric loss and conductive l...

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Abstract

The invention discloses an all-dielectric terahertz sensor based on a metamaterial surface, and belongs to the technical field of sensor manufacturing. The sensor comprises a sensitive element and a thermosensitive circuit connected with the sensitive element, the sensitive element is composed of a cylindrical semiconductor doped with a conductive material and is used for changing the conductivity of the cylindrical semiconductor, and the electromagnetic wave of the terahertz wave band can be absorbed. According to the all-dielectric terahertz sensor based on the metamaterial surface, the medium used by the sensitive element of the sensor is the doped semiconductor, and the heat generated by the semiconductor is very low, so that the influence on surrounding devices is very low, and the all-dielectric terahertz sensor is simple in structure, convenient to manufacture and relatively high in sensitivity.

Description

technical field [0001] The invention belongs to the technical field of sensor manufacturing, and in particular relates to an all-dielectric terahertz sensor based on a metamaterial surface. Background technique [0002] Electromagnetic metamaterials are special artificial materials that do not exist in nature. Because of its extremely high absorption rate of electromagnetic waves in certain wave bands under certain conditions, it has a wide range of applications. [0003] In recent years, with the rapid development of the Internet information age, more electronic products have come out, and electromagnetic waves have gradually appeared in people's field of vision. Combining electromagnetic waves with sensors, people have discovered its value, and sensors have become an inseparable and necessary device in many products. Many household appliances in daily life, such as induction cookers, refrigerators, and microwave ovens, have sensors. The medical field, military field, an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01J5/20
CPCG01J5/20G01J2005/208G01J5/0853G01J5/046B81C1/00698B81C2201/0101B81C2201/0181
Inventor 方明康美军冯健徐珂肖志成程荣生刘星晨黄志祥
Owner ANHUI UNIVERSITY
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