Abstract
In this talk, we discuss our recent efforts in the area of non-reciprocal metamaterials based on moving media or spatiotemporally modulated acoustic elements, aimed at realizing efficient and compact isolation and circulation in acoustic devices. We discuss the relevance of these concepts for new-generation acoustic devices that realize isolation in guided and radiating structures, with relevance for acoustic imaging applications, including ultrasound and sonar technology, and for sound communications. Non-reciprocal responses and built-in isolation and circulation in waveguides and in radiating elements offers the opportunity of translating the advantages recently enabled by non-reciprocal components in electromagnetics, based on full-duplex signal transmission, to acoustic technology.
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