Study of ultrafast magnetism by THz emission spectroscopy (Conference Presentation)

Wentao Zhang; Pablo Maldonado; Zuanming Jin; Tom Seifert; Jacek Arabski; Guy Schmerber; Eric Beaurepaire; Mischa Bonn; Tobias Kampfrath; Peter Oppeneer; Dmitry Turchinovich

doi:10.1117/12.2554408

31 March 2020 Study of ultrafast magnetism by THz emission spectroscopy (Conference Presentation)

Wentao Zhang, Pablo Maldonado, Zuanming Jin, Tom Seifert, Jacek Arabski, Guy Schmerber, Eric Beaurepaire, Mischa Bonn, Tobias Kampfrath, Peter Oppeneer, Dmitry Turchinovich

Author Affiliations +

Proceedings Volume 11348, Terahertz Photonics; 113480W (2020) https://doi.org/10.1117/12.2554408
Event: SPIE Photonics Europe, 2020, Online Only

Abstract

In laser-excited ferromagnetic heterostructures, both ultrafast local magnetization dynamics and spin-transport processes can lead to a THz emission. Here, we demonstrate that the THz emission spectroscopy is a powerful tool to investigate ultrafast magnetization dynamics in laser-excited magnetic systems. The polarity of emitted THz can be used to distinguish which process, local or non-local, dominates the emission of THz in a ferromagnetic heterostructure. The measured THz radiation can be used for rigorous reconstruction of ultrafast magnetization process in the laser-excited magnetic material.

Conference Presentation

Citation Download Citation

Wentao Zhang, Pablo Maldonado, Zuanming Jin, Tom Seifert, Jacek Arabski, Guy Schmerber, Eric Beaurepaire, Mischa Bonn, Tobias Kampfrath, Peter Oppeneer, and Dmitry Turchinovich "Study of ultrafast magnetism by THz emission spectroscopy (Conference Presentation)", Proc. SPIE 11348, Terahertz Photonics, 113480W (31 March 2020); https://doi.org/10.1117/12.2554408

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