Open AccessAcoustic Purcell Effect for Enhanced Emission
Author(s) -
Maryam Landi,
Jiajun Zhao,
Wayne E. Prather,
Ying Wu,
Likun Zhang
Publication year - 2018
Publication title -
physical review letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.688
H-Index - 673
eISSN - 1079-7114
pISSN - 0031-9007
DOI - 10.1103/physrevlett.120.114301
Subject(s) - physics , radiation impedance , purcell effect , sound power , acoustic emission , acoustic impedance , acoustic wave , acoustics , electrical impedance , fermi gamma ray space telescope , spontaneous emission , sound (geography) , computational physics , condensed matter physics , optics , quantum mechanics , laser
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.
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