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

• 来源期刊: 国家科学评论（英文版）
• 年，卷（期）: 2019,（2）
• 页码范围: 231-238
• 页数: 8页
• 语种: 英文
• DOI: 10.1093/nsr/nwy135

摘要

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 ofmetamaterials to practical technology.