Details

Autor(en) / Beteiligte

• Rao, J W
• Yao, Bimu
• Wang, C Y
• Zhang, C
• Yu, Tao
• Lu, Wei

Titel

Unveiling a Pump-Induced Magnon Mode via Its Strong Interaction with Walker Modes

Ist Teil von

• Physical review letters, 2023-01, Vol.130 (4), p.046705-046705, Article 046705

Ort / Verlag

United States

Erscheinungsjahr

2023

Link zum Volltext

Quelle

American Physical Society Journals

Beschreibungen/Notizen

• We observe a power-dependent anticrossing of Walker spin-wave modes under microwave pumping when a ferrimagnet is placed in a microwave waveguide that does not support any discrete photon mode. We interpret this unexpected anticrossing as the generation of a pump-induced magnon mode that couples strongly to the Walker modes of the ferrimagnet. This anticrossing inherits an excellent tunability from the pump, which allows us to control the anticrossing via the pump power, frequency, and waveform. Further, we realize a remarkable functionality of this anticrossing, namely, a microwave frequency comb, in terms of the nonlinear interaction that mixes the pump and probe frequencies. Such a frequency comb originates from the magnetic dynamics and thereby does not suffer from the charge noise. The unveiled hybrid magnonics driven away from its equilibrium enriches the utilization of anticrossing for coherent information processing.