Yingshu Yang

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The rise of spintronic terahertz (THz) emitters has captured considerable attention owing to their potential for delivering high-intensity broadband THz pulses. The quest for enhancing their performance has largely concentrated on two key aspects: the out-coupling of THz radiation and its generation within the material system. A thorough understanding of THz generation and its interaction with photoexcited, out-of-equilibrium materials is pivotal for achieving further progress.

Abstract Spintronic THz emitters (STE) are efficient THz sources constructed using thin heavy-metal (HM) and ferromagnetic-metal (FM) layers. To improve the performance of the STE, different structuring methods (trilayers, stacked bilayers) have been experimentally applied. A theoretical description of the overall THz emission process is necessary to optimize the efficiency of STE.