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|+| type graphene metamaterial capable of realizing plasmon induced transparency and application of |+| type graphene metamaterial

A technology for inducing transparency and plasmons, which is applied in the field of |+| type graphene metamaterials, can solve the problems that restrict the application of plasmon-induced transparency technology, short delay time, etc., and achieve simple structure and high preparation precision Effect

Inactive Publication Date: 2019-03-29
ZHENGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the group delay time of most structures is short, which greatly restricts the application of plasmon-induced transparency technology in slow-light devices.

Method used

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  • |+| type graphene metamaterial capable of realizing plasmon induced transparency and application of |+| type graphene metamaterial
  • |+| type graphene metamaterial capable of realizing plasmon induced transparency and application of |+| type graphene metamaterial
  • |+| type graphene metamaterial capable of realizing plasmon induced transparency and application of |+| type graphene metamaterial

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Embodiment 1

[0028] A |+|-type graphene metamaterial that can realize plasmon-induced transparency, such as figure 1 , 2 As shown, including a substrate and a graphene layer disposed on the substrate. The substrate is silicon dioxide, and the thickness of the substrate is 6um; the material of the graphene layer is graphene, and the thickness is 1nm. Among them, the period P of the |+| structural unit along the x-axis direction and the y-axis direction is 20um, the length L of the parallel vertical graphene strip is 12.5um, and the width is w 1 is 1.5um, the length a of the cross-shaped structure is 6um, and the width is w 2 1.5um. The electrical conductivity of graphene adopts the Drude model electrical conductivity form where the relaxation time is The Fermi velocity is v f =10 6 m / s.

Embodiment 2

[0030] The |+| type graphene metamaterial described in this embodiment that can realize plasmon-induced transparency differs from that of Embodiment 1 in that the period P is 30 um and the substrate thickness is 8 um.

Embodiment 3

[0032] The |+| type graphene metamaterial described in this embodiment that can realize plasmon-induced transparency differs from that of Embodiment 1 in that the period P is 16 um and the substrate thickness is 4 um.

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Abstract

The invention belongs to the field of plasmon induced transparency, and particularly discloses a graphene metamaterial for realizing plasmon induced transparency. The material is composed of a substrate and a graphene layer arranged on the substrate, wherein the graphene layer is composed of |+|type graphene structure units which are periodically arranged on the substrate, and each|+|type graphenestructure unit comprises two vertically-arranged parallel graphene strips and a cross-shaped structure arranged between the parallel graphene strips. The structure is simple, the chromatic dispersionat the transparent window is large, the group speed can be effectively and rapidly slowed down to generate a slow light effect, and the position of the transparent window can be changed by adjustingFermi energy in a terahertz range. In addition, the transparent window can be regulated and controlled by breaking structural symmetry. The graphene metamaterial has a wide application prospect in optical switches, slow light devices, sensors and highly integrated optical paths.

Description

technical field [0001] The invention belongs to the field of plasmon-induced transparency, and in particular relates to a |+| type graphene metamaterial capable of realizing plasmon-induced transparency and an application thereof. Background technique [0002] Plasmon induced transparency (PIT) is a phenomenon similar to electromagnetically induced transparency by using the plasmon properties of metamaterials. The implementation of PIT usually has two modes: light-light mode and light-dark mode. The first mode is based on frequency modulation and hybridization between two bright modes, and the second mode is based on destructive interference between a bright mode and a dark mode. The PIT effect has applications in many fields, such as optical switches, optical information storage, slow-light devices, and sensing fields. [0003] As a single-atom-thick two-dimensional planar material, graphene possesses many special optical properties, such as limit field confinement and lo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01Q15/00G02B5/00
CPCG02B5/008H01Q15/0006
Inventor 范春珍贾微
Owner ZHENGZHOU UNIV
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