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Title: Light-Controllable Digital Coding Metasurfaces
Authors: Zhang X.G.
Tang W.X.
Jiang W.X.
Bai G.D.
Tang J.
Bai L.
Qiu C.-W. 
Cui T.J.
Keywords: far-field radiation pattern
light-controlled digital coding metasurfaces
real-time control of electromagnetic waves
Issue Date: 2018
Publisher: Wiley Open Access
Citation: Zhang X.G., Tang W.X., Jiang W.X., Bai G.D., Tang J., Bai L., Qiu C.-W., Cui T.J. (2018). Light-Controllable Digital Coding Metasurfaces. Advanced Science 2018 (5). ScholarBank@NUS Repository.
Abstract: Since the advent of digital coding metamaterials, a new paradigm is unfolded to sample, compute and program electromagnetic waves in real time with one physical configuration. However, one inconvenient truth is that actively tunable building blocks such as diodes, varactors, and biased lines must be individually controlled by a computer-assisted field programmable gate array and physically connected by electrical wires to the power suppliers. This issue becomes more formidable when more elements are needed for more advanced and multitasked metadevices and metasystems. Here, a remote-mode metasurface is proposed and realized that is addressed and tuned by illuminating light. By tuning the intensity of light-emitting diode light, a digital coding metasurface composed of such light-addressable elements enables dynamically reconfigurable radiation beams in a control-circuitry-free way. Experimental demonstration is validated at microwave frequencies. The proposed dynamical remote-tuning metasurface paves a way for constructing unprecedented digital metasurfaces in a noncontact remote fashion. © 2018 The Authors. Published by WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
Source Title: Advanced Science
ISSN: 21983844
DOI: 10.1002/advs.201801028
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