Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Chiral metasurface terahertz reflective 90-degree polarizer

A metasurface and terahertz technology, applied in antennas, electrical components, etc., can solve the problems of high processing difficulty in the terahertz frequency band, significant asymmetric reflection characteristics, unsatisfactory out-of-band suppression, etc., and achieve high polarization conversion efficiency , Weak asymmetric transmission characteristics, improving the effect of electromagnetic cross-coupling effect

Active Publication Date: 2019-09-24
UNIV OF ELECTRONICS SCI & TECH OF CHINA
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The polarizer can achieve high-efficiency polarization conversion for linear polarization and left / right circularly polarized waves, but the cross polarization conversion efficiency (cross polarization conversion) needs to be improved, and the asymmetric reflection characteristics are significant, with The degree of external suppression is not ideal, the electrical length of the substrate thickness is 1 / 25 wavelength, and it is extremely difficult to process in the terahertz frequency band

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
  • Chiral metasurface terahertz reflective 90-degree polarizer
  • Chiral metasurface terahertz reflective 90-degree polarizer
  • Chiral metasurface terahertz reflective 90-degree polarizer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0032] An asymmetric ELC terahertz reflective polarizer based on a chiral metasurface, such as figure 1 , 2 As shown, the metal chiral structure including the substrate dielectric substrate and the metal chiral structure periodically arranged on the surface of the substrate dielectric substrate; the chiral metasurface structure includes a dielectric material layer and two layers of metal chiral structure surface layers; the two layers The metal chiral structure surface layer is located on both sides of the dielectric material layer. Each layer of the metal chiral structure surface layer is composed of resonant units arranged in a periodic square. The periodic resonant structure has M×N asymmetric L+ cells arranged without spacing. T-shaped metal structure unit, and M=N=50, the resonant unit arrangement structure of the two-layer metal chiral structure surface layer is the same, and the shape structure is a conjugate structure; the resonant unit belonging to the chiral structu...

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

A chiral metasurface terahertz reflective 90-degree polarizer belongs to the technical field of electromagnetic wave full-vector transmission control devices. The invention includes M×N polarization units arranged periodically on a plane, and each polarization unit includes a lining The bottom dielectric substrate, the front resonant structure arranged on the front side of the substrate dielectric substrate, and the reverse resonant structure arranged on the reverse side of the substrate dielectric substrate, the front resonant structure is a centrosymmetric structure, and the reverse resonant structure and the front resonant structure are mutually 90° conjugate, both M and N are integers greater than 20. The present invention utilizes micro-nano manufacturing technology for processing, and compared with realizing the terahertz reflective polarizer by using structures such as ion etching and electro-optical crystals, the present invention has simple structure, small volume, low processing cost and high controllable precision.

Description

technical field [0001] The invention belongs to the technical field of electromagnetic wave full-vector transmission control devices, and relates to a reflective terahertz linear polarization / left-handed and right-handed circular polarizer. Background technique [0002] Terahertz is a unique electromagnetic wave band between microwave and infrared light. It has abundant spectrum resources (frequency ranges from 0.1THz to 10THz) and moderate beamwidth. It has wide application in future high-speed wireless communication and high-resolution imaging radar. The application prospect is an international research hotspot in related fields. [0003] Metamaterials have extraordinary electromagnetic properties that natural electromagnetic materials do not have, such as negative refraction, anomalous Cerenkov radiation, anomalous Doppler effect, super-resolution imaging, stealth, and super-strong electromagnetic polarization rotation capabilities etc., and have broad application prospe...

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 Patents(China)
IPC IPC(8): H01Q15/24
Inventor 兰峰杨梓强史宗君
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com