On‐chip wavefront manipulation of terahertz surface plasmons is crucial for the miniaturization and practical application of terahertz technology. Recently, topological metasurfaces have emerged as a promising avenue for spin‐decoupled wavefront manipulation, leveraging the unique topological properties of non‐Hermitian matrices near their singular points. Despite their innovative phase control mechanisms, topological metasurfaces have not yet been explored for surface plasmon devices. Here, spin‐decoupled wavefront manipulation of terahertz surface plasmons is experimentally achieved using freestanding topological metasurfaces. This approach promises to expand the control methods of surface plasmons and broaden the application scenarios of topological metasurfaces, providing a new paradigm for the design of integrated on‐chip terahertz devices.

中文翻译：

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用于太赫兹表面等离激元自旋解耦波前操纵的拓扑超表面


太赫兹表面等离激元的片上波前操作对于太赫兹技术的小型化和实际应用至关重要。最近，拓扑超表面已成为自旋解耦波前操纵的一条有前途的途径，它利用了非厄米特矩阵在其奇异点附近的独特拓扑特性。尽管拓扑超表面具有创新的相位控制机制，但尚未探索用于表面等离激元器件。在这里，使用独立式拓扑超表面实验实现了太赫兹表面等离激元的自旋解耦波前操纵。这种方法有望扩展表面等离激元的控制方法，拓宽拓扑超表面的应用场景，为集成片上太赫兹器件的设计提供新的范式。