摘要
Signal conversion plays an important role in many applications such as communication,sensing,and imaging.Realizing signal conversion between optical and microwave frequencies is a crucial step to construct hybrid communication systems that combine both optical and microwave wireless technologies to achieve better features,which are highly desirable in the future wireless communications.However,such a signal conversion process typically requires a complicated relay to perform multiple operations,which will consume additional hardware/time/energy resources.Here,we report a light-to-microwave transmitter based on the time-varying and programmable metasurface integrated with a high-speed photoelectric detection circuit into a hybrid.Such a transmitter can convert a light intensity signal to two microwave binary frequency shift keying signals by using the dispersion characteristics of the metasurface to implement the frequency division multiplexing.To illustrate the metasurface-based transmitter,a hybrid wireless communication system that allows dual-channel data transmissions in a light-to-microwave link is demonstrated,and the experimental results show that two different videos can be transmitted and received simultaneously and independently.Our metasurface-enabled signal conversion solution may enrich the functionalities of metasurfaces,and could also stimulate new information-oriented applications.
基金
This work was supported by the National Key Research and Development Program of China(2017YFA0700201,2017YFA0700203,and 2016YFC0800401)
the Major Project of the Natural Science Foundation of Jiangsu Province(BK20212002)
the National Natural Science Foundation of China(61890544 and 61631007)
the China National Postdoctoral Program for Innovative Talents(BX2021063)
the China Postdoctoral Science Foundation(2021M700762)
the Fundamental Research Funds for the Central Universities(2242021k30040)
the Foundation of National Excellent Doctoral Dissertation of China(201444)
the 111 Project(111-2-05).
