振幅
相(物质)
光学
方位角
传输(电信)
物理
光子学
电磁辐射
声学
计算机科学
电信
量子力学
作者
Xi Ming Li,Xiang Xi,Jian Chen,Hua Bing Wu,Xin Li,Qiang Chen,Rui‐Xin Wu
标识
DOI:10.1002/adom.202200326
摘要
Abstract Simultaneously while independently controlling the phase and amplitude of electromagnetic (EM) waves is pivotal yet challenging for waves manipulation. Metasurface provides a possible approach to the challenge, but most of the reports so far are conducted on linearly polarized EM waves. Herein, a stereo meta‐atom‐enabled gradient metasurface that is capable of fully controlling both amplitude and phase for circularly polarized EM waves is proposed and demonstrated. As a proof‐of‐concept, it is shown that transmission gradient metasurfaces can deflect wave beams by the tailored phase of meta‐atoms and transmission efficiency by the tailored amplitude of meta‐atoms. This study further designs a metasurface to be implemented by stereo meta‐atoms for fan‐shaped beamforming where amplitude and phase gradients are required. The experiments prove that the metasurface realizes a good fan‐shaped beam (azimuthal angle range is −30° to 30°). This study provides an avenue to fully manipulate wave beams by metasurfaces, which may trigger lots of interest in photonic metadevices.
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