A multi-focal superlens for terahertz polarization rapid detection

By designing a multifocal metalens and utilizing a metasurface substrate and a rectangular columnar structure array, different polarization components of the incident wave are converted into x-polarization and focused, solving the problem of requiring multiple measurements in existing technologies and realizing efficient and compact terahertz polarization detection.

CN117388962BActive Publication Date: 2026-07-21ZHENGZHOU UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
ZHENGZHOU UNIV
Filing Date
2023-09-06
Publication Date
2026-07-21

AI Technical Summary

Technical Problem

Existing terahertz polarization detection devices require multiple measurements to obtain complete polarization parameters, and lack efficient and compact detection solutions.

Method used

A multifocal metalens is designed, comprising a metasurface substrate and a rectangular columnar structure array. The different polarization components of the incident wave are converted into x-polarization and focused onto the focal plane through six sub-arrays. Rapid polarization detection is achieved by utilizing the transmission coefficient and phase modulation of metaatoms.

Benefits of technology

The relationship between the Stokes parameters of the incident wave and the focal intensity can be established in a single measurement, enabling fast and compact terahertz polarization detection.

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Abstract

The application discloses a kind of multi-focal superlenses for terahertz fast polarization detection, belong to novel artificial electromagnetic material and terahertz science and technology field.The superlens is composed of 2×3 subarrays, each subarray respectively converts one of the six polarization components of incident wave into x polarization and focuses, establishes the connection between the intensity of the six focal points and stokes parameters.Polarization ellipse and stokes parameters are used to characterize the polarization state of the incident light.The polarization detection scheme has wide application prospects in real-time terahertz polarization detection and integrated optics.
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