The Electromomentum Coupling

Willis’ ingenious homogenization theory unveiled a macroscopic coupling between linear momentum and strain in elastic composites. By extending his theory, we discovered an analogous coupling between the linear momentum and the electric field in piezoelectric composites, which we term $electromomentum$ coupling. This coupling provides a mechanism for wave manipulation similar to Willis coupling, but with the added benefit of electrical tunability.

In this talk, I will outline the methods that led to this discovery, discuss its physical origins, illustrate its role in deriving physically meaningful effective models, and demonstrate its application in wavefront shaping.

This seminar is dedicated to Prof. J. R. Willis in honor of his 85th birthday.