Design of resistor-loaded coding metasurface for independent amplitude and phase control

Shiyun Zhou, Tianwu Li and Erping Li

Journal of Electromagnetic Waves and Applications, 2021, vol. 35, issue 12, 1575-1586

Abstract: Due to their subwavelength thickness, light weight and easy fabrication, metasurfaces show obvious advantages over 3D metamaterials. Among this, a new concept so-called digital coding metasurfaces which are described in a direct manner by quantized reflection or refraction phases was proposed. This paper proposes a scheme to achieve simultaneous and independent control of phase and amplitude responses via a reflective coding metasurface as it would be beneficial for full control of propagation of electromagnetic waves. The deflection of the reflected beam is dominated by designed coding patterns of digital unit cells while the amplitude adjustment depends on tuning values of loaded resistances on the unit cells. The simulation and experimental results confirm the function of the metasurface proposed above. The independent control of both phase and amplitude profiles of EM waves implies the potential application in beam shaping and high-quality holography.

Date: 2021
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DOI: 10.1080/09205071.2021.1908916

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