Design of dual electric control metasurface switch filter

A switching filter and metasurface technology, applied in waveguide-type devices, circuits, electrical components, etc., can solve the problem of inability to dynamically control the filter characteristics, and achieve the effect of simple structure, easy control, and convenient production.

Inactive Publication Date: 2021-09-28
UNIV OF ELECTRONIC SCI & TECH OF CHINA
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  • Abstract
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Problems solved by technology

[0004] Usually, once the periodic structure of metamaterials is determined, the filtering characteristics cannot be dynamically adjusted. In order to overcome the above shortcomings, t

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  • Design of dual electric control metasurface switch filter
  • Design of dual electric control metasurface switch filter
  • Design of dual electric control metasurface switch filter

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Embodiment Construction

[0026] The technical scheme of the present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.

[0027] A metasurface switching filter based on vanadium dioxide and graphene provided by the present invention is composed of a graphene metamaterial resonant unit with a cross-shaped metal-vanadium dioxide hybrid structure, and a vanadium dioxide block is embedded in the center of the square-shaped metal structure . The conductivity of the vanadium dioxide is changed by controlling the temperature of the resistance wire by an applied voltage, and finally the electromagnetic wave transmission characteristics are changed by changing the resonance characteristics of the metasurface, thereby realizing the switching characteristics of the filter at different temperatures. The principle of its switching characteristics is: at room temperature, vanadium dioxide is in an insulating state, and when it reaches the phase transition tempe...

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Abstract

The invention discloses a metasurface switch filter based on vanadium dioxide and graphene, and belongs to the technical field of electromagnetic functional devices. The filter comprises a dielectric plate, a graphene layer located on the upper layer of the dielectric plate, a local electromagnetic field enhancement metal structure located on the upper layer of the graphene layer, a dielectric material bottom plate formed below the dielectric plate, and a periodic electric heating device. A resistance wire can be heated through external voltage, so that the conductivity of vanadium dioxide is changed, metasurface switch filtering is achieved, meanwhile, the Fermi level of graphene can be changed through bias voltage, and filtering frequency band fine tuning control can be achieved. Under the normal temperature state, a passband with the average transmittance of 90% is formed in the frequency band of 32 THz-45.7 THz, and under the power-on condition, a stop band with the resonance center frequency of 42.7 THz and the bandwidth of 6.3 THz is formed in the frequency band of 39.4 THz-45.7 THz.

Description

technical field [0001] The invention belongs to the technical field of electromagnetic functional devices, and in particular relates to the design of a metasurface switch filter based on vanadium dioxide and graphene. Background technique [0002] Terahertz wave (Terahertz) is an electromagnetic wave located in the 0.1THz-10THz (30μm-3mm) frequency band, which has crossing areas with microwave and infrared bands. Therefore, Terahertz wave not only has its own unique characteristics, but also has microwave and The advantages of infrared waves, such as high transmittance, instantaneity, and broadband, make it have important application prospects in precision imaging and broadband communications. [0003] As a key component in the electromagnetic control system, the filter has important research value. Filters with wide stopband or passband, steep rising and falling edges, flexible tuning and other characteristics suitable for different systems are hot research directions at p...

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Application Information

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IPC IPC(8): H01P1/20
CPCH01P1/20
Inventor 钟任斌方正梁泽坤
Owner UNIV OF ELECTRONIC SCI & TECH OF CHINA
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