Multiple quantum wells for PT-symmetric phononic crystals

Abstract

We demonstrate that the parity-time symmetry for sound is realized in the laser-pumped multiple-quantum-well structure. Breaking of the parity-time symmetry for the phonons with wave vectors corresponding to the Bragg condition makes the structure a highly-selective acoustic wave amplifier. Single-mode distributed feedback phonon lasing is predicted for structures with realistic parameters.

arXiv comment5 pages, 4 figures + supplement

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Cited by in corpus (10)

• Tunable elastic Parity-Time symmetric structure based on the shunted piezoelectric materials
• Phonoritonic crystals with synthetic magnetic field for acoustic diode
• Optomechanical Kerker effect
• Acoustic Multifunctional Logic Gates and Amplifier based on Passive Parity-Time Symmetry
• Emergent $\mathcal{P}\mathcal{T}$-symmetry breaking of collective modes with topological critical phenomena
• Exceptional points for photon pairs bound by nonlinear dissipation in cavity arrays
• Landau levels and shallow donor states in GaAs/AlGaAs multiple quantum wells at mega-gauss magnetic fields
• Nonadiabatic transitions in non-Hermitian $\mathcal{P}\mathcal{T}$-symmetric two-level systems
• Optomechanical circulator with a polaritonic microcavity
• Optomechanical lasing and domain walls driven by exciton-phonon interactions