| Autor: |
Wang ZY, He XW, Han X, Wang HF, Zhang S |
| Jazyk: |
angličtina |
| Zdroj: |
Optics express [Opt Express] 2024 Feb 12; Vol. 32 (4), pp. 4987-4997. |
| DOI: |
10.1364/OE.513536 |
| Abstrakt: |
We propose a scheme to achieve nonreciprocal parity-time ( P T )-symmetric magnon laser in a P T -symmetric cavity optomagnonical system. The system consists of active and passive optical spinning resonators. We demonstrate that the Fizeau light-dragging effect induced by the spinning of a resonator results in significant variations in magnon gain and stimulated emitted magnon numbers for different driving directions. We find that utilizing the Fizeau light-dragging effect allows the system to operate at ultra-low thresholds even without reaching gain-loss balance. A one-way magnon laser can also be realized across a range of parameters. High tunability of the magnon laser is achieved by changing the spinning speed of the resonators and driving direction. Our work provides a new way to explore various nonreciprocal effects in non-Hermitian magnonic systems, which may be applied to manipulate photons and magnons in multi-body non-Hermitian coupled systems. |
| Databáze: |
MEDLINE |
| Externí odkaz: |
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