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Single-Mode Magnon-Polariton Lasing and Amplification Controlled by Dissipative Coupling
Zi-Qi Wang1, Zi-Yuan Wang1, Yi-Pu Wang1
1Zhejiang University, Zhejiang Key Laboratory of Micro-Nano Quantum Chips and Quantum Control, School of Physics, and State Key Laboratory for Extreme Photonics and Instrumentation, Hangzhou 310027, China.
Physical Review Letters
|November 17, 2025
Summary
We achieved single-mode lasing of magnon polaritons using dissipative coupling in a cavity magnonic system. This breakthrough enables control over light-matter interactions for quantum technologies.
Area of Science:
- Quantum optics
- Condensed matter physics
- Cavity magnonics
Background:
- Cavity magnonics explores light-matter interactions mediated by magnons.
- Dissipative coupling is a key mechanism for controlling quantum systems.
Purpose of the Study:
- To demonstrate single-mode lasing of magnon polaritons.
- To investigate the role of dissipative coupling in cavity magnonic systems.
- To explore new paradigms for light-matter interaction control.
Main Methods:
- Utilizing a cavity magnonic system with a ferrimagnetic spin ensemble.
- Implementing a feedback circuit to partially compensate the microwave cavity mode.
- Tuning compensation and dissipative coupling strengths to control system cooperativity.
Main Results:
- Achieved single-mode lasing of magnon polaritons at unity system cooperativity.
- Observed the formation of a zero-linewidth polariton mode, a bound state in the continuum.
- Demonstrated magnon-polariton amplification in the strong dissipative coupling regime.
Conclusions:
- Dissipative coupling cooperativity is a critical parameter for controlling phase transitions in quantum systems.
- Dissipative coupling provides an alternative method for tailoring light-matter interactions.
- This work advances quantum technologies and information processing.
