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Linear and Nonlinear Polarization Syntheses and Their Programmable Controls based on Anisotropic Time‐Domain Digital Coding Metasurface
Author(s) -
Ke Jun Chen,
Dai Jun Yan,
Chen Ming Zheng,
Wang Li,
Zhang Cheng,
Tang Wankai,
Yang Jin,
Liu Wei,
Li Xin,
Lu Yunfeng,
Cheng Qiang,
Jin Shi,
Cui Tie Jun
Publication year - 2021
Publication title -
small structures
Language(s) - English
Resource type - Journals
ISSN - 2688-4062
DOI - 10.1002/sstr.202000060
Subject(s) - polarization (electrochemistry) , nonlinear system , electronic engineering , physics , time domain , computer science , optics , engineering , chemistry , quantum mechanics , computer vision
Spatial polarization converter can shift the polarization state of incident wave to another state in a specific frequency band. The traditional polarization conversion devices mainly include natural materials and artificial electromagnetic (EM) structures, which are generally sensitive to the incident polarization states and cannot realize polarization manipulations of nonlinear harmonics. These drawbacks limit their developments in wireless communications and radar detection applications. Herein, a general polarization regulation scheme based on anisotropic time‐domain digital coding metasurface is proposed that can achieve both linear and nonlinear polarization syntheses and realize their programmable controls in real time. In this scheme, a nonlinear modulation theory into the polarization conversion methods is integrated, and thus, the scope of the polarization regulation is expanded. An anisotropic time‐domain digital coding metasurface is designed and fabricated to validate the feasibility of the proposed scheme. Theoretical predictions have good agreements with the experiments. The results of this study are expected to promote the developments of space‐time‐polarization regulations and provide efficient approaches for precise EM detections.