Spintronic heterostructures are considered to be the new generation terahertz (THz) sources because of their capability of producing high power and broadband THz radiation. Here, we provide a brief review on the state-of-the-art in this field. The optically excited bi- and tri-layer combinations of ferromagnetic and non-magnetic thin films have become increasingly popular. Towards optimising the THz conversion efficiency and broadband gapless spectrum from these THz emitters, various control parameters need to be taken into consideration. The inverse spin Hall effect in the heavy metal layer of the heterostructure is primarily responsible for the generation of THz pulses. A few new results on iron-, platinum- and tantalum-based heterostructures have also been reported here. It is observed that the Ta(2 nm)/Fe(2 nm)/Pt(2 nm) tri-layer heterostructure generates \(\sim \)40(250)% stronger THz signal than the counterpart Fe(2 nm)/Pt(2 nm) (Fe(3 nm)/Ta(2 nm)) bi-layer heterostructure.

自旋电子异质结构因其产生高功率和宽带太赫兹辐射的能力而被视为新一代太赫兹（THz）源。在这里，我们简要介绍了该领域的最新技术。铁磁和非磁薄膜的光激发双层和三层组合已变得越来越流行。为了优化这些THz发射器的THz转换效率和宽带无间隙频谱，需要考虑各种控制参数。异质结构的重金属层中的逆自旋霍尔效应主要负责产生THz脉冲。在此还报道了一些基于铁，铂和钽的异质结构的新结果。\（\ sim \） THz信号比对应的Fe（2 nm）/ Pt（2 nm）（Fe（3 nm）/ Ta（2 nm））双层异质结构强40（250）％。