用于增强发射的声学珀塞尔效应。

Acoustic Purcell Effect for Enhanced Emission.

作者信息

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

机构信息

National Center for Physical Acoustics and Department of Physics and Astronomy, University of Mississippi, University, Mississippi 38677, USA.

King Abdullah University of Science and Technology (KAUST), Division of Computer, Electrical and Mathematical Sciences and Engineering, Thuwal 23955-6900, Saudi Arabia.

出版信息

Phys Rev Lett. 2018 Mar 16;120(11):114301. doi: 10.1103/PhysRevLett.120.114301.

DOI:10.1103/PhysRevLett.120.114301

PMID:29601769

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.

摘要

我们观察到，在先前提出的元腔体内扬声器的实验测量发射功率增强与我们对源 - 腔系统态密度（DOS）的数值计算增强结果一致。我们通过建立发射声功率与声学DOS之间的关系来解释这种一致性。该公式类似于量子发射中的费米黄金规则。该公式补充了传统声学中用于描述声发射的辐射阻抗理论。我们的研究弥合了声学DOS与用于增强声发射的声学珀塞尔效应之间的差距。