We propose a novel metasurface based on a combined pattern of outer C-shaped ring and inner rectangular ring.By Fourier convolution operation to generating different predesigned sequences of metasurfaces,we realize va...We propose a novel metasurface based on a combined pattern of outer C-shaped ring and inner rectangular ring.By Fourier convolution operation to generating different predesigned sequences of metasurfaces,we realize various functionalities to flexible manipulate terahertz waves including vortex terahertz beam splitting,anomalous vortex terahertz wave deflection,vortex terahertz wave splitting and deflection simultaneously.The incident terahertz wave can be flexibly controlled in a single metasurface.The designed metasurface has an extensive application prospect in the field of future terahertz communication and sensing.展开更多
To enhance transmission eficiency of Pancharatnam Berry(PB)phase metasurfaces,multilayer split-ring resonators were proposed to develop encoding sequences.As per the generalized Snell's law,the deflection angle of...To enhance transmission eficiency of Pancharatnam Berry(PB)phase metasurfaces,multilayer split-ring resonators were proposed to develop encoding sequences.As per the generalized Snell's law,the deflection angle of the PB phase encoding metasurfaces depends on the metasurface period's size.Therefore,it is impossible to design an infinitesimal metasurface unit;consequently,the continuous transmission scattering angle cannot be obtained.In digital signal processing,this study introduces the Fourier convolution principle on encoding metasurface sequences to freely control the trausmitted scattering angles.Both addition and subtraction operations between two diferent encoding sequences were then performed to achieve the continuous variation of the scattering angle.Furthermore,we established that the Fourier convolution principle can be applied to the checkerboard coded metasur-faces.展开更多
基金Project supported by the National Natural Science Foundation of China(Grant Nos.61871355 and 61831012)the Talent Project of Zhejiang Provincial Department of Science and Technology(Grant No.2018R52043)the Research Funds for Universities of Zhejiang Province,China(Grant Nos.2020YW20 and 2021YW86)。
文摘We propose a novel metasurface based on a combined pattern of outer C-shaped ring and inner rectangular ring.By Fourier convolution operation to generating different predesigned sequences of metasurfaces,we realize various functionalities to flexible manipulate terahertz waves including vortex terahertz beam splitting,anomalous vortex terahertz wave deflection,vortex terahertz wave splitting and deflection simultaneously.The incident terahertz wave can be flexibly controlled in a single metasurface.The designed metasurface has an extensive application prospect in the field of future terahertz communication and sensing.
基金This work was supported by the Natu-ral Science Foundation of Zhejiang Province under Grant No.LY20F050007the National Natural Science Foundation of China under Grant No.61875179the National Key Research and De-velopment Project of China under Grant No.2017YFF0206103.
文摘To enhance transmission eficiency of Pancharatnam Berry(PB)phase metasurfaces,multilayer split-ring resonators were proposed to develop encoding sequences.As per the generalized Snell's law,the deflection angle of the PB phase encoding metasurfaces depends on the metasurface period's size.Therefore,it is impossible to design an infinitesimal metasurface unit;consequently,the continuous transmission scattering angle cannot be obtained.In digital signal processing,this study introduces the Fourier convolution principle on encoding metasurface sequences to freely control the trausmitted scattering angles.Both addition and subtraction operations between two diferent encoding sequences were then performed to achieve the continuous variation of the scattering angle.Furthermore,we established that the Fourier convolution principle can be applied to the checkerboard coded metasur-faces.
