Increasing the Efficiency of a Spintronic THz Emitter Based on WSe<sub>2</sub>/FeCo

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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Bibliographic Details
Main Authors: Dinar Khusyainov, Andrey Guskov, Sergei Ovcharenko, Nicolas Tiercelin, Vladimir Preobrazhensky, Arseniy Buryakov, Alexander Sigov, Elena Mishina
Format: article
Language:EN
Published: MDPI AG 2021
Subjects:
magnetic properties and materials
magneto-optics
optical spectroscopy
spintronics
structural properties
surfaces, interfaces and thin films
Technology
T
Electrical engineering. Electronics. Nuclear engineering
TK1-9971
Engineering (General). Civil engineering (General)
TA1-2040
Microscopy
QH201-278.5
Descriptive and experimental mechanics
QC120-168.85
Online Access:https://doaj.org/article/f8553f7939da4514b74332fa7ebcf88b
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Summary: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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