Increasing the efficiency of a spintronic thz emitter based on wse2/feco

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Khusyainov, Dinar | Guskov, Andrey | Ovcharenko, Sergei | Tiercelin, Nicolas | Preobrazhensky, Vladimir L. | Buryakov, Arseniy | Sigov, Alexander | Mishina, Elena

Edité par HAL CCSD ; MDPI

International audience. We report an increase in terahertz (THz) radiation efficiency due to FeCo/WSe2 structures in the reflection geometry. This can be attributed to an absorption increase in the alloy FeCo layer at the input FeCo/WSe2 interface due to constructive interference, as well as to the backward transport of hot carriers from FeCo to WSe2 . In contrast to the transmission geometry, the THz generation efficiency in the reflection is much less dependent on the magnetic layer thickness. Our results suggest a cheap and efficient way to improve the characteristics of THz spintronic emitters with the conservation of a full set of their important properties. © 2021 by the authors. Licensee MDPI, Basel, Switzerland.

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