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Dual-frequency spin-selective multifunctional coded metasurface based on dispensing printing technology
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DOI：10.1016/j.apmt.2026.103245.png)
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Abstract
En 中文
Aiming at the challenges faced by current metasurfaces in large-scale fabrication, such as high cost, complex processes, and difficulty in decoupling multifunctional multiplexing, this paper proposes a dual-frequency spinselective multifunctional coded metasurface based on dispensing printing technology. In terms of fabrication process, an innovative three-layer composite structure of silver paste functional layer- Polyethylene terephthalate (PET) intermediate dielectric layer-graphene film substrate layer is constructed. High-precision dispensing printing is used to replace traditional micro-nano lithography, enabling low-cost and rapid fabrication. In terms of coding design, a new coding strategy based on the geometric angle regulation of unit structures is proposed. By independently adjusting the extension angles of the left and right arms of anisotropic units, a 2 & times; 2 bits spin-selective coding unit library is constructed. This strategy breaks the conjugate phase locking between left-handed circularly polarized (LCP) and (right-handed circularly polarized) RCP waves, enabling independent regulation of LCP at 16 GHz and RCP waves at 26 GHz on the same metasurface. Experimental results show that the fabricated metasurface realizes anomalous beam deflection and vortex-beam excitation in dual-frequency and dual-polarization channels, with good agreement between measurement and simulation. This work provides a practical fabrication route for large-scale metasurfaces and a useful design strategy for multidimensional electromagnetic wave manipulation.
Keywords:
Coded metasurface
Dispensing printing
Dual-frequency spin decoupling
Multifunctional multiplexing
Graphene composite structure
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