电波科学学报2026，Vol.41Issue(2)：290-298,9.DOI:10.12265/j.cjors.2025164
基于二氧化钒的自旋解耦多功能太赫兹超构表面
Spin-decoupled multifunctional terahertz metasurface based on vanadium dioxide
摘要
Abstract
The dynamic and precise control of circularly polarized electromagnetic waves is critical for cutting-edge fields such as chiral-molecule sensing,quantum information processing,and next-generation communications.Metasurfaces present an ideal platform for realizing miniaturized and integrated functional devices due to their sub-wavelength precision in manipulating electromagnetic waves.However,conventional metasurfaces suffer from spin-locking and functionality-freezing limitations,which prevent them from meeting the multi-functional demands of complex scenarios.To overcome these challenges,we propose a switchable,multi-functional terahertz metasurface based on the phase-change material vanadium dioxide(VO2).By synergistically engineering the propagation phase and the Pancharatnam-Berry phase,the device achieves complete decoupling of left-and right-circularly polarized light(LCP/RCP)at 1 THz:at room temperature(dielectric state),it simultaneously deflects reflected LCP and focuses reflected RCP;above the phase-transition temperature(metallic state),it selectively absorbs LCP while converting reflected RCP into a Bessel beam.The metasurface functionality can be dynamically reconfigured on demand by varying the incident polarization and temperature.Featuring high efficiency,low crosstalk,and a compact footprint,this design provides a new design strategy and a practical pathway for developing reconfigurable terahertz devices such as beam splitters,isolators,and imaging systems.关键词
超构表面/二氧化钒/几何相位/自旋解耦/太赫兹波Key words
metasurface/vanadium dioxide/geometric phase/spin-decouple/terahertz wave分类
数理科学引用本文复制引用
王静,王偲涵,汤世伟..基于二氧化钒的自旋解耦多功能太赫兹超构表面[J].电波科学学报,2026,41(2):290-298,9.基金项目
浙江省自然科学基金(LY24A040001) （LY24A040001）
宁波市青年科技创新领军人才项目(2023QL001)Zhejiang Provincial Natural Science Foundation(LY24A040001) （2023QL001）
Ningbo Municipal Program for Young Leading Talents in Science and Technology Innovation(2023QL001) （2023QL001）
