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Complex-Amplitude Programmable Versatile Metasurface Platform Driven by Guided Wave
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DOI：10.1002/advs.202309873.png)
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Abstract
En 中文
Metasurfaces have shown unparalleled controllability of electromagnetic (EM) waves. However, most of the metasurfaces need external spatial feeding sources, which renders practical implementation quite challenging. Here, a low-profile programmable metasurface with 0.05 lambda 0 thickness driven by guided waves is proposed to achieve dynamic control of both amplitude and phase simultaneously. The metasurface is fed by a guided wave traveling in a substrate-integrated waveguide, avoiding external spatial sources and complex power divider networks. By manipulating the state of the p-i-n diodes embedded in each meta-atom, the proposed metasurface enables 1-bit amplitude switching between radiating and nonradiating states, as well as a 1-bit phase switching between 0 degrees and 180 degrees. As a proof of concept, two advanced functionalities, namely, low sidelobe-level beam scanning and Airy beam generation, are experimentally demonstrated with a single platform operating in the far- and near-field respectively. Such complex-amplitude, programmable, and low-profile metasurfaces can overcome integration limitations of traditional metasurfaces, and open up new avenues for more accurate and advanced EM wave control within an unprecedented degree of freedom. A low-profile programmable metasurface with 0.05 lambda 0 thickness driven by guided waves is proposed to achieve dynamic control of both amplitude and phase simultaneously. As a proof of concept, two advanced functionalities, namely, low sidelobe-level beam scanning and Airy beam generation, are experimentally demonstrated with a single platform operating in the far- and near-field respectively. image
Keywords:
ariy beam
complex-amplitude modulation
guided wave-driven metasurface
low sidelobe-level beam scanning
Journal
IF:
14.1
Papers:
1.7W
Citations:
11.5W