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Programmable time-domain digital-coding metasurface for non-linear harmonic manipulation and new wireless communication systems

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National Science Review 2019年第2期6卷 231-238页

作者： Jie Zhao Xi Yang Jun Yan Dai Qiang Cheng Xiang Li Ning Hua Qi Jun Chen Ke Guo Dong Bai Shuo Liu Shi Jin Andrea Alù Tie Jun Cui State Key Laboratory of Millimeter Waves Southeast University Jiangsu Cyber-Space Science & Technology Co. Ltd Physics Program The Graduate Center City University of New York National Mobile communication Research Laboratory Southeast University Synergetic Innovation Center of Wireless communication Technology Southeast University Department of Electrical Engineering City College of New York Photonics Initiative Advanced Science Research Center City University of New York

Optical non-linear phenomena are typically observed in natural materials interacting with light at high intensities, and they benefit a diverse range of applications from communication to sensing. However,controlling harmonic conversion with high efficiency and flexibility remains a major issue in modern optical and radio-frequency systems. Here, we introduce a dynamic time-domain digital-coding metasurface that enables efficient manipulation of spectral harmonic distribution. By dynamically modulating the local phase of the surface reflectivity, we achieve accurate control of different harmonics in a highly programmable and dynamic fashion, enabling unusual responses, such as velocity illusion. As a relevant application, we propose and realize a novel architecture for wireless communication systems based on the time-domain digital-coding metasurface, which largely simplifies the architecture of modern communication systems, at the same time yielding excellent performance for real-time signal transmission. The presented work, from new concept to new system, opens new pathways in the application of metamaterials to practical technology.

关键词： metasurface time-domain digital coding non-linear harmonics control new architecture of communication

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