Two-dimensional metamaterial functional device based on graphene

Abstract

The invention discloses a two-dimensional metamaterial functional device based on grapheme, which comprises a reflected layer on the substrate in sequence order, a dielectric layer and a grapheme micro-nano structure layer, wherein, the grapheme micro-nano structure layer comprises a plurality of configurated grapheme assembly units, each the grapheme assembly unit comprises a plurality of grapheme scattering units, the structure of a a plurality of grapheme scattering units are same from each other. The technical scheme realizes different functional device. In the functional devices, by using a single electrode the Fermi energy levels of the graphene scattering unit is modulated uniformly, the resonant frequency of the graphene scattering unit is controlled, combining with the high mobility characteristics of graphene, the dynamic regulation of incoming light transmission is achieved. In addition, high conversion efficiency can be obtained because of the strong reflectivity light of PB phase shift in the graphene two-dimensional supermaterials.

Description

technical field [0001] The invention belongs to the field of optoelectronic technology, and in particular relates to a functional device based on graphene two-dimensional metamaterial. Background technique [0002] Two-dimensional metamaterials, also known as metasurfaces, are functional devices formed by the arrangement of discrete scatterers with different scattering phases according to certain rules. The design concept of this novel functional device was first proposed by Yu Nanfang et al. on page 333, volume 334 of Science. [0003] By setting the spatial distribution rules of the phase mutation of the scatterers in the layer, the metasurface can not only realize the traditional functions such as anomalous reflection / transmission interface, converging / diverging lens, holographic imaging and optical rotation, but also produce anomalous photon spin Hall effect, etc. Novel optical phenomena, which cannot be realized by traditional optical devices. However, most two-dimens...

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Problems solved by technology

[0005] However, the graphene metamaterials reported in the previous literature can only realize one-dimensional electromagnetic property control, and each graphene strip needs an independent bias voltage to modulate its scattering phase, and the design of its driving circuit is difficult to realize.

In addition, the conversion efficiency of these graphene metamaterials is very low due to the high-order diffraction effect caused by the different scattering field strengths of the graphene strips and the ohmic loss, which greatly limits the application space of graphene metamaterials.

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