a vo-based 2 and graphene hybrid metamaterials for multifunctional devices

A multifunctional, metamaterial technology, applied in the direction of instruments, polarizing elements, optical elements, etc., can solve problems such as structural application limitations

Active Publication Date: 2021-10-15
SOUTH CHINA NORMAL UNIVERSITY
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

These proposed structures can only be tuned by changing the geometric parameters of the structures, making the applications of the structures limited and requiring active control of the spectral response

Method used

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  • a vo-based <sub>2</sub> and graphene hybrid metamaterials for multifunctional devices
  • a vo-based <sub>2</sub> and graphene hybrid metamaterials for multifunctional devices
  • a vo-based <sub>2</sub> and graphene hybrid metamaterials for multifunctional devices

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Embodiment Construction

[0029] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0030] It should be noted that if there is a directional indication (such as up, down, left, right, front, back...) in the embodiment of the present invention, the directional indication is only used to explain the position in a certain posture (as shown in the accompanying drawing). If the specific posture changes, the directional indication will also change accordingly.

[0031] In addition, if there are descriptions involving "first", "second" and ...

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Abstract

The invention discloses a VO-based 2 And a multifunctional device of graphene mixed metamaterial, which relates to the field of optoelectronic technology and includes several unit structures, wherein the unit structure includes a vanadium dioxide layer, a graphene layer, a dielectric layer and a metal reflective layer, and the upper end of the metal reflective layer is provided with There is the dielectric layer, the upper end of the dielectric layer is provided with a graphene layer, a groove is provided in the graphene layer, the groove is deep into the dielectric layer, and vanadium dioxide is provided on the upper end of the bottom of the groove layer, a dielectric layer area is left between the vanadium dioxide layer and the graphene layer; electromagnetic wave polarization conversion is performed by adjusting the Fermi level of the graphene layer, so that the multifunctional device is placed in a perfect absorber. The function conversion between the polarization converter and the polarization converter; it can work in a high temperature environment, and as the temperature increases, the absorption effect of the absorber on electromagnetic waves will not weaken, but will be enhanced; the polarization converter exhibits ultra-thin, broadband and high efficiency.

Description

technical field [0001] The invention relates to the field of optoelectronic technology, in particular to a VO-based 2 and graphene hybrid metamaterials for multifunctional devices. Background technique [0002] Mid-infrared devices have attracted increasing attention due to their unique properties in the mid-infrared region, which has similarities to the terahertz range. At present, perfect absorbers and polarization converters have become research hotspots in the mid-infrared band. As two important branches of optical devices, broadband absorbers and polarization converters have important applications in imaging devices, thermal emitters, sensors, modulators, and camouflage devices. [0003] However, conventional broadband perfect absorbers and polarization converters are realized by stacks of ultraplanar films consisting of alternating layers of metal / dielectric films with a total thickness much larger than the operating wavelength. These bulky designs obviously go agai...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B5/00G02B5/30G02B1/00
CPCG02B1/002G02B5/003G02B5/30
Inventor 韦中超毛敏
Owner SOUTH CHINA NORMAL UNIVERSITY
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