Exceptional-point-engineered cavity magnomechanics

Tian-Xiang Lu, Hui-Lai Zhang, Qian Zhang, Hui Jing

2021Physical review. A/Physical review, A100 citationsDOI

Abstract

We theoretically study the role of the exceptional point (EP) in a non-Hermitian cavity magnomechanical (CMM) system, with a tunable dissipative magnon-photon coupling. We find that the EP emerging in such a system can radically change the properties of photons and phonons. As a result, flexible on-off optical transmission, coherent switching of slow and fast lights, and enhanced mechanical cooling deep into the ground state can be achievable by approaching the EP. Detailed comparisons between this system and its Hermitian counterpart are given. Our results show that EP-assisted CMM devices can serve as tools for applications in optical communications and electromechanical switching or sensing.

Topics & Concepts

Dissipative systemPhotonPhotonicsHermitian matrixTransmission (telecommunications)PhysicsPoint (geometry)Coupling (piping)OptoelectronicsOpticsQuantum mechanicsComputer scienceTelecommunicationsEngineeringMechanical engineeringMathematicsGeometryMechanical and Optical ResonatorsQuantum Mechanics and Non-Hermitian PhysicsTopological Materials and Phenomena