Circular polarization multiplexing terahertz metasurface based on double-phase hybrid design and phase contour design method

By adopting a dual-phase hybrid design and cross-dislocation structure in the metasurface of the terahertz band, combined with Pancharatnam-Berry phase, spin-decoupled beam deflection and vortex beam generation are achieved, solving the problem of spin-multiplexed wavefront manipulation in the terahertz band, simplifying the system structure and improving efficiency.

CN119846748AActive Publication Date: 2025-04-18CHENGDU UNIV OF INFORMATION TECH
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Patent Information

Application Number
CN202510225380.7
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-02-27
Publication Date
2025-04-18
Estimated Expiration
2045-02-27

AI Technical Summary

Technical Problem

In the terahertz band, the existing metasurface scheme has not yet been able to effectively realize spin multiplexed wavefront manipulation, and the research on chiral superstructure devices in this band is relatively lacking.

Method used

Using a circularly polarization multiplexed terahertz metasurface based on biphasic hybrid design, spin-decoupled beam deflection and vortex beam generation are achieved by introducing a cross-dislocation structure of misalignment and internal rotation in the hyperatomic unit, combined with the Pancharatnam-Berry phase.

Benefits of technology

The single optical component realizes the deflection and focus function simultaneously, without complex optical path design or mechanical adjustment, simplifies system structure and reduces costs, and is suitable for reconstructible optical systems and polarization multiplexed communications.

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Abstract

The invention discloses a circular polarization multiplexing terahertz metasurface based on double-phase hybridization design and a phase contour design method, and belongs to the field of metasurs.The circular polarization multiplexing terahertz metasurface comprises periodically-arranged super-atom units, and each super-atom unit comprises a silicon substrate and an asymmetric silicon resonator arranged on the silicon substrate; the asymmetric silicon resonator is of a cross-shaped dislocation structure introducing dislocation and internal rotation. By adopting the circular polarization multiplexing terahertz metasurface based on the double-phase hybrid design and the phase contour design method, the mirror symmetry of the silicon resonator is broken and the C2 symmetry is reserved, so that a controllable linear polarization conversion effect in transmitted waves is obtained, and polarization-dependent double-function optical control is realized; the optical system has the advantages of high performance, dynamic adjustability and integration, and provides an innovative design thought for a next-generation compact optical system.
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Citation Information

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