Versatile four-channel polarization generation and detection based on a terahertz metadevice

作者：Zhen Yue, Jitao Li, Chenglong Zheng, Qianyun Zhang, Ming-Yang Chen, Yun Zhang, Zijie Dai, Xiaoxian Song, Jingjing Zhang, Yunxia Ye, Jingyu Liu, Yan Zhang, Jianquan Yao · 发表于：Photonics Research · 年份：2025 · DOI：10.1364/prj.567791 · 被引用次数：4 · 研究领域：Photonic and Optical Devices、Terahertz technology and applications

Flexible manipulation and efficient detection of terahertz wave polarization states remain critical challenges for advancing terahertz technologies in communications, biomedicine, and environmental monitoring. This study innovatively proposes an all-dielectric metadevice integrated platform that achieves coordinated polarization generation and detection through multidimensional polarization-channel multiplexing. The proposed device integrates four polarization-conversion functional units into a single planar architecture, enabling synchronous generation of four independent polarization channels under unpolarized incidence while establishing direct correlations between their intensity profiles and the polarization state of incident waves. Leveraging the Stokes parameter framework, we develop a high-efficiency detection mechanism that precisely reconstructs incident polarization states utilizing only four-channel intensity information, overcoming the limitations of conventional multi-component cascaded polarization detection systems. Experimental results demonstrate the device’s exceptional polarization-resolving capability at 0.9 THz. Furthermore, the platform exhibits significant potential for multidimensional optical field manipulation, successfully generating four-channel polarization-vortex beams with independent topological charges. This compact multichannel polarization-control strategy opens new avenues, to our knowledge, for developing portable terahertz imaging system...