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Phonon laser in a cavity magnomechanical system
Ming-Song Ding1, Li Zheng2, Chong Li3
1School of Physics, Dalian University of Technology, Dalian, 116024, China.
Scientific Reports
|November 2, 2019
Summary
This study demonstrates a new method for creating a phonon laser using a cavity magnomechanical system. An adjustable magnetic field offers enhanced control over phonon laser generation, similar to optomechanical systems.
Area of Science:
- Quantum optics
- Condensed matter physics
- Cavity optomechanics
Background:
- Phonon lasers simulate optical laser action using phonons.
- Cavity magnomechanical systems couple phonons, magnons, and photons.
- Magnetostrictive and magnetic dipole interactions mediate these couplings.
Purpose of the Study:
- To theoretically investigate phonon laser generation in a cavity magnomechanical system.
- To explore the role of an external magnetic field in controlling phonon lasers.
- To compare the performance and control capabilities with existing optomechanical systems.
Main Methods:
- Theoretical modeling of a cavity magnomechanical system.
- Analysis of phonon-magnon and photon-magnon coupling mechanisms.
- Determination of the driving magnetic field threshold for phonon lasing.
Main Results:
- The threshold intensity of the driving magnetic field for phonon laser action was determined.
- An adjustable external magnetic field was shown to effectively control the phonon laser.
- The threshold power was found to be comparable to that in optomechanical systems.
Conclusions:
- Cavity magnomechanical systems provide a viable platform for phonon laser generation.
- Magnetic field control offers a novel manipulation degree of freedom for phonon lasers.
- This research may stimulate advancements in magnetically controlled phonon laser technology.
