Optically Controlled Topologically Protected Acoustic Wave Amplification
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AbstractAcoustic topological insulators that lead to backscattering-immune edge states provide an important way to control and manipulate the behaviors of phonons. To date, most of these acoustic systems are based on single-particle Hamiltonians that conserve particle number. Here, we exploit particle-nonconserving phonon-photon interactions to engineer not only the band structure but also the dissipation of acoustic waves. We find a topologically protected edge state for phonons that can be parametrically amplified while all the bulk modes remain stable. This phenomenon can be exploited to realize topologically protected nonreciprocal traveling-wave amplification for phonons, which may find wide applications in classical and quantum acoustics.
All Author(s) ListMa JW, Feng ZY, Li Y, Sun XK
Journal nameIEEE Journal of Selected Topics in Quantum Electronics
Volume Number26
Issue Number5
Article number7600410
LanguagesEnglish-United States

Last updated on 2021-23-02 at 23:50