Controlling polarization of spintronic THz emitter by remanent magnetization texture
Abstract
Terahertz (THz) sciences and technologies have contributed to a rapid development of a wide range of applications and expanded the frontiers in fundamental science. Spintronic terahertz emitters offer conceptual advantages since the spin orientation in the magnetic layer can be easily controlled either by the externally applied magnetic field or by the internal magnetic field distribution determined by the specific shape of the magnetic elements. Here, we report a switchable terahertz source based on micropatterned magnetic heterostructures driven by femtosecond laser pulses. We show that the precise tunability of the polarization state is facilitated by the underlying magnetization texture of the magnetic layer that is dictated by the shape of the microstructure. These results also reveal the underlying physical mechanisms of a nonuniform magnetization state on the generation of ultrafast spin currents in the magnetic heterostructures. Our findings indicate that the emission of the linearly polarized THz waves can be switched on and off by saturating the sample using a biasing magnetic field, opening fascinating perspectives for integrated on-chip THz devices with wide-ranging potential applications.
- Publication Date:
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 1879577
- Grant/Contract Number:
- AC02- 06CH11357
- Resource Type:
- Publisher's Accepted Manuscript
- Journal Name:
- Applied Physics Letters
- Additional Journal Information:
- Journal Name: Applied Physics Letters Journal Volume: 121 Journal Issue: 5; Journal ID: ISSN 0003-6951
- Publisher:
- American Institute of Physics
- Country of Publication:
- United States
- Language:
- English
Citation Formats
Wu, Weipeng, Lendinez, Sergi, Kaffash, Mojtaba Taghipour, Schaller, Richard D., Wen, Haidan, and Jungfleisch, M. Benjamin. Controlling polarization of spintronic THz emitter by remanent magnetization texture. United States: N. p., 2022.
Web. doi:10.1063/5.0096252.
Wu, Weipeng, Lendinez, Sergi, Kaffash, Mojtaba Taghipour, Schaller, Richard D., Wen, Haidan, & Jungfleisch, M. Benjamin. Controlling polarization of spintronic THz emitter by remanent magnetization texture. United States. https://doi.org/10.1063/5.0096252
Wu, Weipeng, Lendinez, Sergi, Kaffash, Mojtaba Taghipour, Schaller, Richard D., Wen, Haidan, and Jungfleisch, M. Benjamin. Wed .
"Controlling polarization of spintronic THz emitter by remanent magnetization texture". United States. https://doi.org/10.1063/5.0096252.
@article{osti_1879577,
title = {Controlling polarization of spintronic THz emitter by remanent magnetization texture},
author = {Wu, Weipeng and Lendinez, Sergi and Kaffash, Mojtaba Taghipour and Schaller, Richard D. and Wen, Haidan and Jungfleisch, M. Benjamin},
abstractNote = {Terahertz (THz) sciences and technologies have contributed to a rapid development of a wide range of applications and expanded the frontiers in fundamental science. Spintronic terahertz emitters offer conceptual advantages since the spin orientation in the magnetic layer can be easily controlled either by the externally applied magnetic field or by the internal magnetic field distribution determined by the specific shape of the magnetic elements. Here, we report a switchable terahertz source based on micropatterned magnetic heterostructures driven by femtosecond laser pulses. We show that the precise tunability of the polarization state is facilitated by the underlying magnetization texture of the magnetic layer that is dictated by the shape of the microstructure. These results also reveal the underlying physical mechanisms of a nonuniform magnetization state on the generation of ultrafast spin currents in the magnetic heterostructures. Our findings indicate that the emission of the linearly polarized THz waves can be switched on and off by saturating the sample using a biasing magnetic field, opening fascinating perspectives for integrated on-chip THz devices with wide-ranging potential applications.},
doi = {10.1063/5.0096252},
journal = {Applied Physics Letters},
number = 5,
volume = 121,
place = {United States},
year = {Wed Aug 03 00:00:00 EDT 2022},
month = {Wed Aug 03 00:00:00 EDT 2022}
}
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