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Structure for enhancing surface plasmon coupling strength of graphene

A surface plasmon, coupling strength technology, applied in the field of light sources, to achieve the effect of simple structure and improved coupling

Active Publication Date: 2019-06-18
UNIV OF ELECTRONICS SCI & TECH OF CHINA ZHONGSHAN INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Most of the current research focuses on the strong coupling between surface plasmons and excitons in dyes or small molecules, but there is little research on the strong coupling between surface plasmons and excitons in semiconductor quantum dots

Method used

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  • Structure for enhancing surface plasmon coupling strength of graphene
  • Structure for enhancing surface plasmon coupling strength of graphene
  • Structure for enhancing surface plasmon coupling strength of graphene

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] This embodiment provides a method such as figure 1 The structure shown to improve the coupling strength of plasmons on the upper surface of graphene includes a multilayer composed of a first metal film 1, a first light-emitting layer 2, a graphene layer 3, a second light-emitting layer 4, and a second metal film 5. Structure; the first metal film 1 is provided with a first light-emitting layer 2 above the first light-emitting layer 2 is provided with a graphene layer 3, the graphene layer 3 is provided with a second light-emitting layer 4 A second metal film 5 is provided above the second light-emitting layer 4; the first metal film 1 and the second metal film 5 are both used as the positive electrode of the power supply, and the graphene layer 3 is used as the negative electrode of the power supply. The power circuit of the first metal film 1, the first light-emitting layer 2, the graphene layer 3 is formed on the lower side; the second metal film 5, the second light-emi...

Embodiment 2

[0030] This embodiment provides a method such as figure 2 The structure shown to improve the coupling strength of plasmons on the upper surface of graphene includes a multilayer composed of a first metal film 1, a first light-emitting layer 2, a graphene layer 3, a second light-emitting layer 4, and a second metal film 5. Structure; the first metal film 1 is provided with a first light-emitting layer 2 above the first light-emitting layer 2 is provided with a graphene layer 3, the graphene layer 3 is provided with a second light-emitting layer 4 A second metal film 5 is provided above the second light-emitting layer 4, and the graphene layer 3 is composed of a plurality of graphene strips arranged in the same direction; the first metal film 1 and the second metal film 5 are both used as the positive electrode of the power supply. , The graphene layer 3 is used as the negative electrode of the power supply, so that the power circuit of the first metal film 1, the first light-emi...

Embodiment 3

[0036] This embodiment provides a method such as image 3 The structure shown to improve the coupling strength of plasmons on the upper surface of graphene includes a multilayer composed of a first metal film 1, a first light-emitting layer 2, a graphene layer 3, a second light-emitting layer 4, and a second metal film 5. Structure; the first metal film 1 is provided with a first light-emitting layer 2 above the first light-emitting layer 2 is provided with a graphene layer 3, the graphene layer 3 is provided with a second light-emitting layer 4 , A second metal film 5 is arranged above the second light-emitting layer 4, and the graphene layer 3 is a V-shaped wave plane; the first metal film 1 and the second metal film 5 are both used as the positive electrode of the power supply, and the graphene layer 3 as the negative electrode of the power supply, in this way, the power circuit of the first metal film 1, the first light-emitting layer 2, the graphene layer 3 is formed on the...

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Abstract

The invention relates to a structure for enhancing the surface plasmon coupling strength of graphene. The structure has a multilayer structure formed by a first metal film, a first light-emitting layer, a graphene layer, a second light-emitting layer, and a second metal film. The first light emitting layer is disposed above the first metal film; the graphene layer is disposed above the first lightemitting layer; the a second light emitting layer is disposed above the graphene layer; and the second metal film is arranged above the second light emitting layer. The structure is simple; the optical characteristics of the graphene can be fully utilized; and the optical structure of the surface plasmon coupling strength can be enhanced. Because of the bar-shaped graphene on the optical structure, directed transmission of the surface plasmon is realized. Besides, more surface plasmons can be coupled by using the non-planar graphene layer, so that the degree of coupling of the surface plasmonis improved substantially.

Description

Technical field [0001] The invention belongs to the technical field of light sources, and specifically relates to a structure for improving the coupling strength of plasmons on the upper surface of graphene. Background technique [0002] Surface Plasmons (SurfacePlasmons, SPs) is an electromagnetic surface wave formed by the coherent oscillation of free electrons at the interface of a metal medium. Since SPs can realize the transmission and manipulation of light in the sub-wavelength range, and can generate significantly enhanced local photoelectric fields in some special metal micro-nano structures, they are used in biosensors, surface Raman scattering enhancement and photonic circuits, etc. There are important applications in many fields. In recent years, the composite of noble metal nanoparticles and semiconductor nanostructures to obtain an optically resonant system has caused a research boom due to its unique and excellent properties different from composite monomers. The ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B5/00
Inventor 刘黎明吴艳花迟锋王红航张小文易子川张智
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA ZHONGSHAN INST