Phonon laser in a cavity magnomechanical system

Abstract

Using phonons to simulate an optical two-level laser action has been the focus of research. We theoretically study phonon laser in a cavity magnomechanical system, which consist of a microwave cavity, a sphere of magnetic material and a uniform external bias magnetic field. This system can realize the phonon-magnon coupling and the cavity photon-magnon coupling via magnetostrictive interaction and magnetic dipole interaction respectively, the magnons are driven directly by a strong microwave field simultaneously. Frist, the intensity of driving magnetic field which can reach the threshold condition of phonon laser is given. Then, we demonstrate that the adjustable external magnetic field can be used as a good control method to the phonon laser. Compared with phonon laser in optomechanical systems, our scheme brings a new degree of freedom of manipulation. Finally, with the experimentally feasible parameters, threshold power in our scheme is close to the case of optomechanical systems. Our study may inspire the field of magnetically controlled phonon lasers.

Dynamical Backaction Magnomechanics

“…Here, we report cavity magnomechanical detection of all of the fundamental dynamical backaction effects, i.e. dynamical heating (amplification) and cool-ing (damping) -leading to phonon lasing [42,43] and noise squashing [44] -and the first observation of the magnonic spring effect [37]. These results are enabled, in part, by homodyne detection of the mechanics, with reduced clamping and viscous damping.…”

“…In this situation, the mechanical oscillations will grow exponentially in time and will ultimately be limited by higher-order nonlinear effects. This parametric instability is analogous to lasing and is often referred to as phonon lasing [42,43,60,61]. The onset of lasing can clearly be seen in Fig.…”

Entangling the vibrational modes of two massive ferromagnetic spheres using cavity magnomechanics

“…Other quantum effects like tripartite Einstein-Podolsky-Rosen steering have also been studied [35]. In addition, many other interesting topics have been explored in CMM, including magnetically tunable slow light [36], phonon lasing [37], thermometry [38], and parity-time-related phenomena [39][40][41].…”

Single-quadrature quantum magnetometry in cavity electromagnonics

“…Moreover, microwave photon-magnon interaction affects the dynamics of cavity magnomechanics [38] where magnons interact with microwave photons and phonons respectively via magnetic dipole and magnetostrictive interactions. This interaction in different hybrid quantum magnonic-based systems such as cavity electromagnonics and cavity magnome-chanics has important effects including microwave-to-optical quantum transducer [39], quantum entanglement generation [40][41][42][43][44][45][46][47], generation of magnon squeezed states [48], phononic laser [49], quantum thermometry [50], quantum magnetometry [10,11,14], magnon blockade [51,52], quantum illumination [53], and magnon-assisted photon-phonon conversion [54].…”