A synthetic moving-envelope metasurface antenna for independent control of arbitrary harmonic orders

Geng-Bo Wu, Jun Yan Dai (), Kam Man Shum, Ka Fai Chan, Qiang Cheng (), Tie Jun Cui () and Chi Hou Chan ()
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Geng-Bo Wu: State Key Laboratory of Terahertz and Millimeter Waves (City University of Hong Kong)
Jun Yan Dai: Southeast University
Kam Man Shum: State Key Laboratory of Terahertz and Millimeter Waves (City University of Hong Kong)
Ka Fai Chan: State Key Laboratory of Terahertz and Millimeter Waves (City University of Hong Kong)
Qiang Cheng: Southeast University
Tie Jun Cui: Southeast University
Chi Hou Chan: State Key Laboratory of Terahertz and Millimeter Waves (City University of Hong Kong)

Nature Communications, 2024, vol. 15, issue 1, 1-13

Abstract: Abstract Flexible frequency controls are crucial in many photonic and electronic applications, ranging from communications systems, spectroscopy, and metrology to quantum information processing. However, the state-of-the-art solutions based on nonlinear bulk media, electro-optic effect, and nonlinear metasurfaces incur very limited spectral controllability, and merely a couple of harmonic orders can be independently manipulated. Here, we theoretically propose and experimentally demonstrate synthetic moving-envelope metasurface antennas capable of simultaneously generating arbitrary harmonic orders and independently manipulating their wave properties in a software-defined manner. As proof-of-principle examples, we demonstrate unidirectional frequency transition, frequency comb generation, arbitrary harmonic orders independent control, and their applications in frequency-division multiplexing communications. All these complicated functionalities are achieved by the 1-bit spatiotemporally ON-OFF switching of meta-atoms of the waveguide-integrated metasurface antenna. Our proposed synthetic metasurface antenna solution greatly expands the frontiers of wave engineering and information manipulation, showing promising potential in wireless communications, spectroscopy, metrology, and quantum science.

Date: 2024
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DOI: 10.1038/s41467-024-51587-0

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