| Autor: |
Huang, C., Luo, L., Mootz, M., Shang, J., Man, P., Su, L., Perakis, I. E., Yao, Y. X., Wu, A., Wang, J. |
| Rok vydání: |
2024 |
| Předmět: |
|
| Zdroj: |
Nature Communications (2024) |
| Druh dokumentu: |
Working Paper |
| DOI: |
10.1038/s41467-024-47471-6 |
| Popis: |
Nonlinear interactions of spin-waves and their quanta, magnons, have emerged as prominent candidates for interference-based technology, ranging from quantum transduction to antiferromagnetic spintronics. Yet magnon multiplication in the terahertz (THz) spectral region represents a major challenge. Intense, resonant magnetic fields from THz pulse-pairs with controllable phases and amplitudes enable high order THz magnon multiplication, distinct from non-resonant nonlinearities such as the high harmonic generation by below-band gap electric fields. Here, we demonstrate exceptionally high-order THz nonlinear magnonics. It manifests as 7$^\text{th}$-order spin-wave-mixing and 6$^\text{th}$ harmonic magnon generation in an antiferromagnetic orthoferrite. We use THz multi-dimensional coherent spectroscopy to achieve high-sensitivity detection of nonlinear magnon interactions up to six-magnon quanta in strongly-driven many-magnon correlated states. The high-order magnon multiplication, supported by classical and quantum spin simulations, elucidates the significance of four-fold magnetic anisotropy and Dzyaloshinskii-Moriya symmetry breaking. Moreover, our results shed light on the potential quantum fluctuation properties inherent in nonlinear magnons. |
| Databáze: |
arXiv |
| Externí odkaz: |
|
