Increasing the Efficiency of a Spintronic THz Emitter Based on WSe(2)/FeCo

We report an increase in terahertz (THz) radiation efficiency due to FeCo/WSe(2) structures in the reflection geometry. This can be attributed to an absorption increase in the alloy FeCo layer at the input FeCo/WSe(2) interface due to constructive interference, as well as to the backward transport o...

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Detalles Bibliográficos
Autores principales: Khusyainov, Dinar, Guskov, Andrey, Ovcharenko, Sergei, Tiercelin, Nicolas, Preobrazhensky, Vladimir, Buryakov, Arseniy, Sigov, Alexander, Mishina, Elena
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2021
Materias:
Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8585334/
https://www.ncbi.nlm.nih.gov/pubmed/34772004
http://dx.doi.org/10.3390/ma14216479
Descripción
Sumario:We report an increase in terahertz (THz) radiation efficiency due to FeCo/WSe(2) structures in the reflection geometry. This can be attributed to an absorption increase in the alloy FeCo layer at the input FeCo/WSe(2) interface due to constructive interference, as well as to the backward transport of hot carriers from FeCo to WSe(2). 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.

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