Highly efficient generation and arbitrary manipulation of spin-polarized terahertz(THz)radiation will enable chiral lightwave driven quantum nonequilibrium state regulation,induce new electronic structures,consequentl...Highly efficient generation and arbitrary manipulation of spin-polarized terahertz(THz)radiation will enable chiral lightwave driven quantum nonequilibrium state regulation,induce new electronic structures,consequently provide a powerful experi-mental tool for investigation of nonlinear THz optics and extreme THz science and applications.THz circular dichromic spectroscopy,ultrafast electron bunch manipulation,as well as THz imaging,sensing,and telecommunication,also need chiral THz waves.Here we review optical generation of circularly-polarized THz radiation but focus on recently emerged polarization tunable spintronic THz emission techniques,which possess many advantages of ultra-broadband,high efficiency,low cost,easy for integration and so on.We believe that chiral THz sources based on the combination of electron spin,ultra-fast optical techniques and material structure engineering will accelerate the development of THz science and applications.展开更多
基金This work was supported by the Open Project Program of Wuhan National Laboratory for Optoelectronics(No.2018WNLOKF001)the National Key R&D Program of China(No.2019YFB2203102).
文摘Highly efficient generation and arbitrary manipulation of spin-polarized terahertz(THz)radiation will enable chiral lightwave driven quantum nonequilibrium state regulation,induce new electronic structures,consequently provide a powerful experi-mental tool for investigation of nonlinear THz optics and extreme THz science and applications.THz circular dichromic spectroscopy,ultrafast electron bunch manipulation,as well as THz imaging,sensing,and telecommunication,also need chiral THz waves.Here we review optical generation of circularly-polarized THz radiation but focus on recently emerged polarization tunable spintronic THz emission techniques,which possess many advantages of ultra-broadband,high efficiency,low cost,easy for integration and so on.We believe that chiral THz sources based on the combination of electron spin,ultra-fast optical techniques and material structure engineering will accelerate the development of THz science and applications.
