Reflective-type circularly polarized plane hyperlens based on graphene metasurface
A metasurface and graphene technology, applied in electrical components, antennas, etc., can solve the problems of low efficiency, non-tunable performance, and low practicability of metal metasurface lenses
Inactive Publication Date: 2018-11-09
ZHENGZHOU UNIVERSITY OF AERONAUTICS
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[0005] The purpose of the present invention is to provide a reflective circularly polarized planar metalens based on graphene metasurfaces to solve the problems of low efficiency, non-tunable performance and low practicability of current metal metasurface lenses
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[0039] The specific embodiments of the present invention will be further described below in conjunction with the accompanying drawings.
[0040] Such as figure 1 Shown is the structural representation of the reflective circularly polarized planar superlens based on graphene metasurface of the present invention, including metal base layer 3, dielectric layer 2 on the base layer, graphene metasurface layer 1 above the dielectric layer, and Controllable bias voltage device connecting graphene metasurface and metal substrate.
[0041] Such as figure 2 -(a) shows a schematic diagram of a graphene supersurface layer of the present invention, the graphene supersurface layer is made by offering rectangular hollow holes arranged in a matrix on a single-layer graphene sheet, and all the rectangular hole sizes are same. Such as figure 2 -(b) is shown as figure 2 -Schematic diagram of the structural unit of the graphene metasurface layer shown in (a), wherein the period of the rec...
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Abstract
The invention relates to a reflective-type circularly polarized plane hyperlens based on a graphene metasurface, and belongs to the field of novel artificial electromagnetic materials and optical devices. The plane hyperlens comprises a lower metal substrate layer, a middle dielectric layer and an upper graphene metasurface layer which is provided with a rectangular hole array and is used for controlling the polarization direction and propagation characteristic of a reflected wave. In addition, the hyperlens is also provided with a controllable bias voltage device which is connected with the graphene metasurface and the metal substrate, so as to adjust the Fermi energy of the graphene metasurface layer, to change the conductivity of the graphene layer, and to achieve the dynamic tunable focusing performance of a graphene metasurface lens. The plane hyperlens can achieve the wideband focusing, and is easy to control. Compared with a transmission-type hyperlens which is too low in transmission efficiency, the plane hyperlens is more suitable for an actual scene, and is higher in practicality.
Description
technical field [0001] The invention relates to a reflective circularly polarized plane superlens based on a graphene metasurface, which belongs to the field of novel artificial electromagnetic materials and optical devices. Background technique [0002] Metamaterials (metamaterials) is a general term for new artificial electromagnetic media with extraordinary physical properties that natural media do not possess. It is usually arranged periodically by sub-wavelength metal or dielectric units capable of electrical and magnetic responses. Its macroscopic electromagnetic properties Different from conventional materials, it has many new properties that natural materials do not have. Metasurface is an ultra-thin two-dimensional array plane constructed of metamaterial structural units, which not only retains the singular properties of three-dimensional metamaterials, but also overcomes the difficulties faced in the preparation of three-dimensional metamaterials. By adjusting the...
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Login to View More IPC IPC(8): H01Q15/02H01Q15/00
CPCH01Q15/002H01Q15/02
Inventor 丁佩麻华丽朱双美李明玉段向阳曾凡光
Owner ZHENGZHOU UNIVERSITY OF AERONAUTICS