Geometric phase coded metasurface: from polarization dependent directive electromagnetic wave scattering to diffusion-like scattering

• DOI: 10.1038/srep35968
• Publication Date: 2016-10-24T09:45:45Z
• Authors: Ke Chen; Yijun Feng; Zhongjie Yang; Li Cui; Junming Zhao; Bo Zhu; Tian Jiang
• Keywords: 0202 electrical engineering, electronic engineering, information engineering; 02 engineering and technology; Article

Abstract Ultrathin metasurface compromising various sub-wavelength meta-particles offers promising advantages in controlling electromagnetic wave by spatially manipulating the wavefront characteristics across interface. The recently proposed digital coding could even simplify design and optimization procedures due to digitalization of meta-particle geometry. However, current attempts implement still utilize several structural obtain certain responses, requiring time-consuming especially multi-bits designs. In this regard, we present herein utilizing geometric phase based single structured with orientations achieve either 1-bit or metasurface. Particular scattering patterns dependent on incident polarizations can be tailored encoded metasurfaces regular sequences. On contrast, polarization insensitive diffusion-like also been successfully achieved randomly distributed sequences leading substantial suppression backward a broadband microwave frequency. provide simple designs reveal new opportunities for without dependence.