TRAPPED PHONON IN ACOUSTIC METAMATERIAL

摘要

We derive an analytic expression for the Goos–Hanchen shift experienced by an acous-tic wave that is totally reflected at the interface between a negative-refractive-indexacoustic medium and a positive-index acoustic medium. Upon obtaining the conditionnecessary for phonon-trapping in a three-layer heterostructure, we introduce a designfor an "acoustic clepsydra" by using a suitable acoustic heterostructure.