التفاصيل البيبلوغرافية
| العنوان: |
Efficient ultrafast field-driven spin current generation for spintronic terahertz frequency conversion. |
| المؤلفون: |
Ilyakov, Igor, Brataas, Arne, de Oliveira, Thales V. A. G., Ponomaryov, Alexey, Deinert, Jan-Christoph, Hellwig, Olav, Faßbender, Jürgen, Lindner, Jürgen, Salikhov, Ruslan, Kovalev, Sergey |
| المصدر: |
Nature Communications; 11/2/2023, Vol. 14 Issue 1, p1-8, 8p |
| مصطلحات موضوعية: |
FREQUENCY changers, SECOND harmonic generation, REAL-time computing, SUBMILLIMETER waves, SEEBECK effect, LATTICE dynamics, COHERENCE (Physics) |
| مستخلص: |
Efficient generation and control of spin currents launched by terahertz (THz) radiation with subsequent ultrafast spin-to-charge conversion is the current challenge for the next generation of high-speed communication and data processing units. Here, we demonstrate that THz light can efficiently drive coherent angular momentum transfer in nanometer-thick ferromagnet/heavy-metal heterostructures. This process is non-resonant and does neither require external magnetic fields nor cryogenics. The efficiency of this process is more than one order of magnitude higher as compared to the recently observed THz-induced spin pumping in MnF2 antiferromagnet. The coherently driven spin currents originate from the ultrafast spin Seebeck effect, caused by a THz-induced temperature imbalance in electronic and magnonic temperatures and fast relaxation of the electron-phonon system. Owing to the fact that the electron-phonon relaxation time is comparable with the period of a THz wave, the induced spin current results in THz second harmonic generation and THz optical rectification, providing a spintronic basis for THz frequency mixing and rectifying components. Terahertz frequencies offer the potential of much higher data transfer rates, but this requires devices able to generate and manipulate terahertz waves. One approach is to utilize the spin dynamics of a magnetic system. Here, Ilyakov et al. show how a multilayer magnetic and heavy-metal heterostructure can be used to achieve terahertz second harmonic generation and optical rectification. [ABSTRACT FROM AUTHOR] |
|
Copyright of Nature Communications is the property of Springer Nature and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) |
| قاعدة البيانات: |
Complementary Index |
Full Text Finder