Terahertz(THz)science and technology have attracted significant attention based on their unique applications in non-destructive imaging,communications,spectroscopic detection,and sensing.However,traditional THz device...Terahertz(THz)science and technology have attracted significant attention based on their unique applications in non-destructive imaging,communications,spectroscopic detection,and sensing.However,traditional THz devices must be sufficiently thick to realise the desired wave-manipulating functions,which has hindered the development of THz integrated systems and applications.Metasurfaces,which are two-dimensional metamaterials consisting of predesigned meta-atoms,can accurately tailor the amplitudes,phases,and polarisations of electromagnetic waves at subwavelength resolutions,meaning they can provide a flexible platform for designing ultra-compact and high-performance THz components.This review focuses on recent advancements in metasurfaces for the wavefront manipulation of THz waves,including the planar metalens,holograms,arbitrary polarisation control,special beam generation,and active metasurface devices.Such ultra-compact devices with unique functionality make metasurface devices very attractive for applications such as imaging,encryption,information modulation,and THz communications.This progress report aims to highlight some novel approaches for designing ultra-compact THz devices and broaden the applications of metasurfaces in THz science.展开更多
基金This work is supported in part by the National Key Research and Development Program of China(2017YFA0701005)National Natural Science Foundation of China(61871268,61722111)+6 种基金Natural Science Foundation of Shanghai(18ZR1425600),Shanghai Pujiang Program(18PJD033)"Shuguang"Program of Shanghai Education Commission(19SG44)Shanghai international joint laboratory project(17590750300)111 Project(D18014)Shanghai top talent program.the Russian Foundation for Basic Research under Grant 18-29-20104 and Grant 20-21-00143the Ministry of Science and Higher Education in part within the Agreement No.075-15-2019-1950in part within the State assignment FSRC“Crystallography and Photonics”RAS.
文摘Terahertz(THz)science and technology have attracted significant attention based on their unique applications in non-destructive imaging,communications,spectroscopic detection,and sensing.However,traditional THz devices must be sufficiently thick to realise the desired wave-manipulating functions,which has hindered the development of THz integrated systems and applications.Metasurfaces,which are two-dimensional metamaterials consisting of predesigned meta-atoms,can accurately tailor the amplitudes,phases,and polarisations of electromagnetic waves at subwavelength resolutions,meaning they can provide a flexible platform for designing ultra-compact and high-performance THz components.This review focuses on recent advancements in metasurfaces for the wavefront manipulation of THz waves,including the planar metalens,holograms,arbitrary polarisation control,special beam generation,and active metasurface devices.Such ultra-compact devices with unique functionality make metasurface devices very attractive for applications such as imaging,encryption,information modulation,and THz communications.This progress report aims to highlight some novel approaches for designing ultra-compact THz devices and broaden the applications of metasurfaces in THz science.
