Increasing the Efficiency of a Spintronic THz Emitter Based on WSe<sub>2</sub>/FeCo
We report an increase in terahertz (THz) radiation efficiency due to FeCo/WSe<sub>2</sub> structures in the reflection geometry. This can be attributed to an absorption increase in the alloy FeCo layer at the input FeCo/WSe<sub>2</sub> interface due to constructive interferen...
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Autores principales: | , , , , , , , |
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Formato: | article |
Lenguaje: | EN |
Publicado: |
MDPI AG
2021
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Materias: | |
Acceso en línea: | https://doaj.org/article/f8553f7939da4514b74332fa7ebcf88b |
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Sumario: | We report an increase in terahertz (THz) radiation efficiency due to FeCo/WSe<sub>2</sub> structures in the reflection geometry. This can be attributed to an absorption increase in the alloy FeCo layer at the input FeCo/WSe<sub>2</sub> interface due to constructive interference, as well as to the backward transport of hot carriers from FeCo to WSe<sub>2</sub>. 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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