Sui, S. ., J. . Yu, H. . Ma, J. . Zhang, J. . Wang, Z. . Xu, and S. . Qu. “Ultra-Wideband Polarization Conversion Metasurface Based on Topology Optimal Design and Geometry Tailor”. Applied Computational Electromagnetics Society Journal (ACES), vol. 31, no. 07, Aug. 2021, pp. 843-6, https://journals.riverpublishers.com/index.php/ACES/article/view/10055.