Spectrum selective absorber based on single-layer graphene and Bragg grating

A Bragg grating and graphene technology, applied in the field of ultra-narrow-band spectral selective absorbers, achieves the effects of small spatial correlation, flexible and convenient use, and stable performance

Inactive Publication Date: 2016-05-11
SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
View PDF1 Cites 18 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Hu et al. explored the enhanced absorption phenomenon in graphene nanostrips based on a multilayer grating structure, but complete light absorption can only be achieved when light is non-normally incident [Prior Art 5: Hu, et al., Appl. Phys. Lett.105, 221113 (2014)】

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Spectrum selective absorber based on single-layer graphene and Bragg grating
  • Spectrum selective absorber based on single-layer graphene and Bragg grating
  • Spectrum selective absorber based on single-layer graphene and Bragg grating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0017] The present invention will be further described below in conjunction with the embodiments and accompanying drawings, but the protection scope of the present invention should not be limited thereby. see first figure 1 , figure 1 It is the geometric structure of the ultra-narrow-band TE polarization spectrum selective absorber based on graphene monolayer and Bragg grating for the optical communication band of the present invention. In the figure, region 1 is uniform and is air (refractive index n 1 = 1). The TE polarized light is vertically incident on the device, and the vibration direction of the TE polarized light corresponding to the electric field vector is perpendicular to the incident plane, that is, the y-axis.

[0018] As can be seen from the figure, the ultra-narrow-band TE polarization spectrum selective absorber based on graphene single layer and Bragg grating used in the optical communication band of the present invention includes a top-down dielectric gra...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention provides an ultra-narrow-band TE polarization spectrum selective absorber based on a single-layer graphene and a Bragg grating. The absorber comprises a dielectric grating layer, the single-layer graphene and a Bragg grating layer; wherein the dielectric grating layer, the single-layer graphene and the Bragg grating layer are successively arranged from top to bottom. The period, the ridge width and the thickness of the dielectric grating layer are respectively 574-576 nanometers, 548-550 nanometers and 219-221 nanometers. The Bragg grating layer is composed of at least 20 pairs of low-refractivity dielectric panels and high-refractivity dielectric panels. The thickness of each low-refractivity dielectric panel is 340-350 nanometers, and the thickness of each high-refractivity dielectric panel is 165-175 nanometers. The spectrum selective absorber can be manufactured according to optical holographic recording technology or electron-beam direct-writing device and micro-electron deep-etching process. The ultra-narrow-band TE polarization spectrum selective absorber has advantages of convenient material acquisition, low manufacture cost, large-batch production and important use prospect.

Description

technical field [0001] This patent relates to a graphene-based ultra-narrow-band spectrally selective absorber, especially an ultra-narrow-band TE polarization spectrally selective absorber based on a graphene monolayer and a Bragg grating for optical communication bands. Background technique [0002] In recent years, graphene has been extensively studied due to its unique electrical, optical, mechanical, and thermal properties. As an ultrathin two-dimensional carbon-based material just discovered a few years ago, graphene has been applied in many fields, such as optical modulators, absorbers, imaging devices, photodetectors and broadband polarizers, etc. Since the graphene monolayer is only a single atomic layer thick, the main challenge in these applications is how to enhance the interaction between light and graphene, so how to realize the complete light absorption of the graphene monolayer has become a trend. [0003] In the mid-to-far infrared band, graphene has two im...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): G02B27/00G02B5/00
CPCG02B27/00G02B5/003
Inventor 吴俊周常河李民康项长铖
Owner SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap