Acoustic Purcell Effect for Enhanced Emission

Maryam Landi, Jiajun Zhao, Wayne E. Prather, Ying Wu, Likun Zhang

Research output: Contribution to journalArticlepeer-review

31 Scopus citations

Abstract

We observe that our experimentally measured emission power enhancement of a speaker inside a previously proposed metacavity agrees with our numerically calculated enhancement of the density of states (DOS) of the source-cavity system. We interpret the agreement by formulating a relation between the emitted sound power and the acoustic DOS. The formulation is an analog to Fermi’s golden rule in quantum emission. The formulation complements the radiation impedance theory in traditional acoustics for describing sound emission. Our study bridges the gap between acoustic DOS and the acoustic Purcell effect for sound emission enhancement.
Original languageEnglish (US)
JournalPhysical Review Letters
Volume120
Issue number11
DOIs
StatePublished - Mar 13 2018

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