Exceptional Points in Random-Defect Phonon Lasers

Abstract

Intrinsic defects in optomechanical devices are generally viewed to be detrimental for achieving coherent amplification of phonons, and great care has thus been exercised in fabricating devices and materials with no (or a minimal number of) defects. Contrary to this view, here we show that, by surpassing an exceptional point (EP), both the mechanical gain and the phonon number can be enhanced despite increasing defect losses. This counterintuitive effect, well described by an effective non-Hermitian phonon-defect model, provides a mechanical analog of the loss-induced purely optical lasing. This opens the way to operating random-defect phonon devices at EPs.

9 pages, 6 figures

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Cited by in corpus (48)

• Non-Hermitian Physics
• Second-Order Topological Phases in Non-Hermitian Systems
• Nonreciprocal unconventional photon blockade in a spinning optomechanical system
• Nonreciprocal Phonon Laser
• Fermion doubling theorems in 2D non-Hermitian systems for Fermi points and exceptional points
• Optomechanically Induced Transparency at Exceptional Points
• Non-Hermitian Hamiltonians and no-go theorems in quantum information
• $\mathcal{P}\mathcal{T}$-symmetric circuit-QED
• Non-Hermitian topological Mott insulators in one-dimensional fermionic superlattices
• Nonreciprocal photon blockade via quadratic optomechanical coupling
• Topological band theory for non-Hermitian systems from the Dirac equation
• Liouvillian exceptional points of any order in dissipative linear bosonic systems: Coherence functions and switching between $\mathcal{P}\mathcal{T}$ and anti-$\mathcal{P}\mathcal{T}$ symmetries
• Loss-induced transparency in optomechanics
• Quantum and semiclassical exceptional points of a linear system of coupled cavities with losses and gain within the Scully-Lamb laser theory
• Scully-Lamb quantum laser model for parity-time-symmetric whispering-gallery microcavities: Gain saturation effects and non-reciprocity
• Selective optomechanically-induced amplification with driven oscillators
• Non-Hermitian Topological Metamaterials with Odd Elasticity
• Linear response theory of open systems with exceptional points
• Exceptional Points in Two Dissimilar Coupled Diode Lasers
• Phase-Controlled Phonon Laser
• Diabolical Points in Coupled Active Cavities with Quantum Emitters
• Photon blockade in non-Hermitian optomechanical systems with nonreciprocal couplings
• Collectively induced exceptional points of quantum emitters coupled to nanoparticle surface plasmons
• Improving sound absorption through nonlinear active electroacoustic resonators
• Optomechanical dynamics in the $\mathcal{P}\mathcal{T}$- and broken-$\mathcal{P}\mathcal{T}$-symmetric regimes
• Loschmidt echo and fidelity decay near an exceptional point
• New perspective on chiral exceptional points with application to discrete photonics
• Zero-point excitation of a circularly moving detector in an atomic condensate and phonon laser dynamical instabilities
• Engineering non-Hermitian Second Order Topological Insulator in Quasicrystals
• Exceptional point induced lasing dynamics in a non-Hermitian system
• Virtual exceptional points in an electromechanical system
• Higher order topological degeneracies and towards unique successive state-switching in a four-level open system
• Creating and controlling exceptional points of non-Hermitian Hamiltonians via homodyne Lindbladian invariance
• The nanosphere phonon laser
• Searching for exceptional points and inspecting non-contractivity of trace distance in (anti-)$\mathcal{P}\mathcal{T}-$symmetric systems
• Hybrid coupling optomechanically assisted nonreciprocal photon blockade
• Subthreshold phonon generation in an optomechanical system with an exceptional point
• Tunable partial polarization beam splitter and optomechanically induced Faraday effect
• Anomalous spontaneous emission dynamics at chiral exceptional points
• Generating coherent phonon waves in narrow-band materials: a twisted bilayer graphene phaser
• Nonlinear optomechanical systems with quasi-periodic and chaotic dynamics
• Liouvillian and Hamiltonian exceptional points of atomic vapors: The spectral signatures of quantum jumps
• Exceptional point enhanced optical gyroscope in mechanical PT-symmetric system
• Superradiance-driven Phonon Laser
• Proposal for measuring Newtonian constant of gravitation at an exceptional point in an optomechanical system
• Integrated molecular optomechanics with hybrid dielectric-metallic resonators
• Third-order exceptional surface in a pseudo-Hermitian superconducting circuit
• Molecular-optomechanical phonon laser