Gain-assisted controllable fast-light generation in cavity magnomechanics
Abstract
We study the controllable output field generation from a cavity magnomechanical resonator system that consists of two coupled microwave resonators. The first cavity interacts with a ferrimagnetic yttrium iron garnet (YIG) sphere providing the magnon-photon coupling. Under a passive cavities configuration, the system displays high absorption, prohibiting output transmission even though the dispersive response is anomalous. We replace the second passive cavity with an active one to overcome high absorption, producing an effective gain in the system. We show that the deformation of the YIG sphere retains the anomalous dispersion. Further, tuning the exchange interaction strength between the two resonators leads to the system's effective gain and dispersive response. As a result, the advancement associated with the amplification of the probe pulse can be controlled in the proximity of the magnomechanical resonance. Furthermore, we find the existence of an upper bound for the intensity amplification and the advancement of the probe pulse that comes from the stability condition. These findings may find potential applications for controlling light propagation in cavity magnomechanics.
- Publication:
-
Physical Review A
- Pub Date:
- September 2023
- DOI:
- 10.1103/PhysRevA.108.033517
- arXiv:
- arXiv:2306.04390
- Bibcode:
- 2023PhRvA.108c3517D
- Keywords:
-
- Physics - Optics;
- Quantum Physics
- E-Print:
- doi:10.1103/PhysRevA.108.033517