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This is a In Vitro Study study.

August 18, 2025Open Access

Broadband terahertz metasurfaces for anomalous reflection and vortex beam generation

ZCZhe ChenKunming University of Science and Technology RMRan‐Ran MaWannan Medical College JFJia FuUniversity of Electronic Science and Technology of China

Puntos clave

The metasurfaces demonstrate efficient wavefront modulation, utilizing circularly polarized wave illumination to achieve phase coverage.
Covering a frequency range of 1.6–3.2 THz, the design supports various applications including quantum communication and optical sensing.
Incorporating Pancharatnam–Berry phase mechanism, the metasurfaces exhibit notable optical properties, enhancing potential functionalities.
Strategically arranged meta-atoms lead to distinct performance improvements, emphasizing the relevance of advanced metasurface technologies.

Resumen

This paper presents a broadband terahertz (THz) meta-atom composed of copper and polyimide, capable of efficient wavefront modulation. By leveraging the Pancharatnam–Berry phase mechanism, the meta-atom achieves full 0–2π phase coverage across a wide frequency range of 1.6–3.2 THz under circularly polarized wave illumination through the rotation of its top metallic structure. Based on this design, we further demonstrate three types of broadband metasurfaces by strategically arranging the meta-atoms, achieving anomalous reflection, orbital angular momentum (OAM) generation, and deflected OAM generation, respectively. The proposed broadband THz metasurfaces hold significant potential for advanced applications in quantum communication and optical sensing systems.

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