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We present a new approach to address the phase error induced by the near-field coupling effect among meta-atoms in metasurfaces. Our method estimates the actual phase shifts of the meta-atoms by utilizing a periodic model that considers the meta-atom of interest and its closest neighbors. The estimated phase is then used to replace the meta-atoms via an iterative process. To demonstrate the effectiveness of our approach, we designed an achromatic metalens as a numerical example. We anticipate that our work will offer a valuable way to accurate metasurface design, leading to enhanced performance of meta-optical devices.
Shengyuan Chang andXingjie Ni
"Compensation of coupling-induced phase error in meta-optical devices", Proc. SPIE PC12646, Metamaterials, Metadevices, and Metasystems 2023, PC126460N (4 October 2023); https://doi.org/10.1117/12.2677111
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Shengyuan Chang, Xingjie Ni, "Compensation of coupling-induced phase error in meta-optical devices," Proc. SPIE PC12646, Metamaterials, Metadevices, and Metasystems 2023, PC126460N (4 October 2023); https://doi.org/10.1117/12.2677111