提高基于WSe/FeCo的自旋电子太赫兹发射器的效率

Increasing the Efficiency of a Spintronic THz Emitter Based on WSe/FeCo.

作者信息

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

机构信息

Department of Nanoelectronics, MIREA-Russian Technological University, 119454 Moscow, Russia.

University of Lille, CNRS, Centrale Lille, Université Polytechnique Hauts-de-France, UMR 8520-IEMN, 59000 Lille, France.

出版信息

Materials (Basel). 2021 Oct 28;14(21):6479. doi: 10.3390/ma14216479.

DOI:10.3390/ma14216479

PMID:34772004

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC8585334/

Abstract

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

摘要

我们报道了在反射几何结构中，由于FeCo/WSe结构导致的太赫兹（THz）辐射效率的提高。这可归因于在输入的FeCo/WSe界面处，合金FeCo层因相长干涉而吸收增加，以及热载流子从FeCo向WSe的反向传输。与透射几何结构相比，反射中的太赫兹产生效率对磁性层厚度的依赖性要小得多。我们的结果表明，有一种廉价且高效的方法可以改善太赫兹自旋电子发射器的特性，同时保留其所有重要特性。