Modelling of spintronic terahertz emitters as a function of spin generation and diffusion geometry
Spintronic THz emitters (STE) are efficient THz sources constructed using thin heavy-metal (HM) and ferromagnetic-metal (FM) layers. To improve the performance of the STE, different structuring methods (trilayers, stacked bilayers) have been experimentally applied. A theoretical description of th...
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sg-ntu-dr.10356-1699082023-08-14T15:34:49Z Modelling of spintronic terahertz emitters as a function of spin generation and diffusion geometry Yang, Yingshu Dal Forno, Stefano Battiato, Marco School of Physical and Mathematical Sciences Science::Physics Diffusion Geometries Emission Process Spintronic THz emitters (STE) are efficient THz sources constructed using thin heavy-metal (HM) and ferromagnetic-metal (FM) layers. To improve the performance of the STE, different structuring methods (trilayers, stacked bilayers) have been experimentally applied. A theoretical description of the overall THz emission process is necessary to optimize the efficiency of STE. In particular, geometry, composition, pump laser frequency, and spin diffusion will be significant in understanding the pathways for further research developments. This work will apply a generalized model based on a modified Transfer Matrix Method (TMM). We will consider the spin generation and diffusion in the FM and HM layers and explain the spintronic THz emission process. This model is suitable for calculating emitted THz signal as a function of FM and HM thicknesses for different geometrical configurations. We will investigate a bilayer geometry as a test case, but the extension to a multi-layer configuration is straightforward. We will show how the different configurations of the sample will influence the THz emission amplitude. Nanyang Technological University Published version M.B. acknowledges Nanyang Technological University, NAP-SUG. 2023-08-14T07:27:27Z 2023-08-14T07:27:27Z 2022 Journal Article Yang, Y., Dal Forno, S. & Battiato, M. (2022). Modelling of spintronic terahertz emitters as a function of spin generation and diffusion geometry. Physical Review B, 107(14), 144407-1-144407-8. https://dx.doi.org/10.1103/PhysRevB.107.144407 1098-0121 https://hdl.handle.net/10356/169908 10.1103/PhysRevB.107.144407 2-s2.0-85152145595 14 107 144407-1 144407-8 en NAP-SUG Physical Review B © 2023 American Physical Society. All rights reserved. This paper was published in Physical Review B and is made available with permission of American Physical Society. application/pdf |
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Science::Physics Diffusion Geometries Emission Process Yang, Yingshu Dal Forno, Stefano Battiato, Marco Modelling of spintronic terahertz emitters as a function of spin generation and diffusion geometry |
description |
Spintronic THz emitters (STE) are efficient THz sources constructed using
thin heavy-metal (HM) and ferromagnetic-metal (FM) layers. To improve the
performance of the STE, different structuring methods (trilayers, stacked
bilayers) have been experimentally applied. A theoretical description of the
overall THz emission process is necessary to optimize the efficiency of STE. In
particular, geometry, composition, pump laser frequency, and spin diffusion
will be significant in understanding the pathways for further research
developments. This work will apply a generalized model based on a modified
Transfer Matrix Method (TMM). We will consider the spin generation and
diffusion in the FM and HM layers and explain the spintronic THz emission
process. This model is suitable for calculating emitted THz signal as a
function of FM and HM thicknesses for different geometrical configurations. We
will investigate a bilayer geometry as a test case, but the extension to a
multi-layer configuration is straightforward. We will show how the different
configurations of the sample will influence the THz emission amplitude. |
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School of Physical and Mathematical Sciences |
author_facet |
School of Physical and Mathematical Sciences Yang, Yingshu Dal Forno, Stefano Battiato, Marco |
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Article |
author |
Yang, Yingshu Dal Forno, Stefano Battiato, Marco |
author_sort |
Yang, Yingshu |
title |
Modelling of spintronic terahertz emitters as a function of spin generation and diffusion geometry |
title_short |
Modelling of spintronic terahertz emitters as a function of spin generation and diffusion geometry |
title_full |
Modelling of spintronic terahertz emitters as a function of spin generation and diffusion geometry |
title_fullStr |
Modelling of spintronic terahertz emitters as a function of spin generation and diffusion geometry |
title_full_unstemmed |
Modelling of spintronic terahertz emitters as a function of spin generation and diffusion geometry |
title_sort |
modelling of spintronic terahertz emitters as a function of spin generation and diffusion geometry |
publishDate |
2023 |
url |
https://hdl.handle.net/10356/169908 |
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1779156799131222016 |