Controllable three-dimensional optical invisible cloak based on multiple graphene loop layers

Abstract

The present invention provides a controllable three-dimensional optical invisible cloak based on multiple graphene loop layers. The cloak is achieved by a surface coating casing layer formed by the graphene loop layers. The surface covering casing layer comprises the multiple graphene loop layers in an overlaying manner from bottom to top. By controlling the Fermi level distribution of graphene in the different loop layers, each layer is enabled to correspond to different dielectric constants and magnetic conductivity, the three-dimensional dielectric constant and the magnetic conductivity distribution required by optical invisibility are obtained, light rays which should pass through a cloak area originally only can bypass the cloak area, and the light rays recover to the original distribution after bypassing the cloak area, so that an object in the cloak area is invisible. At the same time, by controlling the Fermi level distribution of the graphene loop layers in a cycling manner, the real-time on / off performance of the optical invisible cloak is achieved, and a shortcoming that an optical invisible cloak in prior art can not be on / off in a cycling manner is overcome..

Description

technical field [0001] The invention relates to a method and a device for realizing a controllable three-dimensional optical invisibility cloak based on a multi-layer graphene ring layer, which can be applied to the control of the propagation direction of light waves. Background technique [0002] In 2006, Document 1: "J.B.Pendry et al, SCIENCE, 2006(312): 1780" first proposed that the use of anisotropic medium can control the propagation direction of light waves to realize the concept of optical cloak, which has attracted widespread attention and became the field of optics research hotspot. In the same year, Document 2: "D.Schurig et al, SCIENCE, 2006 (314): 977" first experimentally verified the two-dimensional metamaterial invisibility cloak in the microwave section. In 2007, Document 3: "Cai et al, Nature Photonics, 2007(1): 224" proposed a two-dimensional metamaterial invisibility cloak for transverse magnetic waves. In 2010, Document 4: "Ma et al, Nature communicatio...

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is: overcome the shortcoming that most of existing optical invisibility cloaks are based on two-dimensional planar structures, and the invisibility function of optical invisibility cloaks does not possess tunability (that is, the invisibility function of light cannot be turned on / off), and utilize graphene This common material provides a new technology to realize an adjustable (open / close) three-dimensional optical invisibility cloak, which makes the system have the advantages of simple structure, fast speed, easy operation, low energy consumption, strong real-time performance and low implementation cost.

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