摘要
Space-time-modulated metastructures characterized by spatiotemporally varying properties have recently attracted great interest and become one of the most fascinating and promising research fields.In the meantime,space-time-coding digital metasurfaces with inherently programmable natures emerge as powerful and versatile platforms for implementing the spatiotemporal modulations,which have been successfully realized and used to manipulate the electromagnetic waves in both the spectral and spatial domains.In this article,we systematically introduce the general concepts and working principles of space-time-coding digital metasurfaces and provide a comprehensive survey of recent advances and representative applications in this field.Specifically,we illustrate the examples of complicated wave manipulations,including harmonic beam control and programmable nonreciprocal effect.The fascinating strategy of space-time-coding opens the door to exciting scenarios for information systems,with abundant applications ranging from wireless communications to imaging and radars.We summarize this review by presenting the perspectives on the existing challenges and future directions in this fast-growing research field.
出处
《Research》
SCIE
EI
CAS
CSCD
2021年第1期961-985,共25页
研究（英文）
基金
supported by the China Postdoctoral Science Foundation(2020M680062)
the Fundamental Research Funds for the Central Universities(2242021R20001)
the National Key Research and Development Program of China(2017YFA0700201,2017YFA0700202,and 2017YFA0700203)
the National Natural Science Foundation of China(61631007,61571117,61501112,61501117,61522106,61731010,61735010,61722106,61701107,and 61701108)
the 111 Project(111-2-05).
