摘要
Programmable metasurfaces enable real-time control of electromagnetic waves in a digital coding manner,which are suitable for implementing time-domain metasurfaces with strong harmonic manipulation capabilities.However,the time-domain metasurfaces are usually realized by adopting the wired electrical control method,which is effective and robust,but there are still some limitations.Here,we propose a light-controllable time-domain digital coding metasurface consisting of a full-polarization dynamic metasurface and a high-speed photoelectric detection circuit,from which the microwave reflection spectra are manipulated by time-varying light signals with periodic phase modulations.As demonstrated,the light-controllable timedomain digital coding metasurface is illuminated by the light signals with two designed time-coding sequences.The measured results show that the metasurface can well generate symmetrical harmonics and white-noise-like spectra,respectively,under such cases in the reflected wave.The proposed lightcontrollable time-varying metasurface offers a planar interface to tailor and link microwaves with lights in the time domain,which could promote the development of photoelectric hybrid metasurfaces and related multiphysics applications.
基金
supported by the China National Postdoctoral Program for Innovative Talents (Grant No. BX2021063)
the China Postdoctoral Science Foundation (Grant No. 2021M700762)
the National Key Research and Development Program of China (Grant Nos. 2017YFA0700201, 2017YFA0700203, and 2016YFC0800401)
the National Natural Science Foundation of China (Grant Nos. 61890544, 61631007, 61571117, 61731010, 61735010, 61722106, 61701107, and 61701108)
the Fundamental Research Funds for the Central Universities (Grant No 2242021k30040)
the Foundation of National Excellent Doctoral Dissertation of China (Grant No. 201444)
the 111 Project (Grant No. 111-2-05)
