太赫兹辐射
材料科学
涡流
磁光
领域(数学)
光电子学
磁电机
旋涡
光学
磁场
工程物理
凝聚态物理
物理
热力学
量子力学
功率(物理)
数学
纯数学
作者
Hang Yin,Hao Wang,Fei Fan,Pengxuan Li,Huijun Zhao,Yunyun Ji,Jierong Cheng,Shengjiang Chang
标识
DOI:10.1002/adom.202500088
摘要
Abstract Terahertz vortex fields hold immense potential for wideband, high‐capacity wireless communication. However, existing functional devices face challenges such as the lack of multi‐channel multiplexing and active control capabilities. Here, a magneto‐optical dielectric spiral metasurface that enables the generation and active rotation of vortex fields with different functionalities is proposed: within the frequency band of a completely orthogonal polarization conversion, the vortex beams excited by the two spin photonic states exhibit distinct topological charges with the mode purity of over 80% and focusing characteristics with spatial separation between them. In addition, within the frequency band of half orthogonal polarization conversion, a spiral field distribution can be obtained resulting from interference between the conversion and the direct‐through components. By adjusting the magnetic field, the device allows dynamic, nonreciprocal rotation of both local polarization states and vortex fields. The rotation angle is determined by magnetization and topological charge with a maximum rotation of up to 180°. The magneto‐optical light field manipulation mechanism offers promising applications in high‐capacity communications, information encryption, and particle manipulation.
科研通智能强力驱动
Strongly Powered by AbleSci AI