  Inspired by the natural piezoelectric effect, we introduce hybrid-wave
electromechanical meta-atoms and meta-molecules that consist of coupled
electrical and mechanical oscillators with similar resonance frequencies. We
propose an analytical model for the linearized electromechanical scattering
process, and explore its properties based on first principles. We demonstrate
that by exploiting the linearized hybrid-wave interaction, one may enable
functionalities that are forbidden otherwise, going beyond the limits of
today's metamaterials. As an example we show an electrically deep
sub-wavelength dimer of meta-atoms with extremely sensitive response to the
direction-of-arrival of an impinging electromagnetic wave. This scheme of
meta-atoms and molecules may open ways for metamaterials with a plethora of
exciting dynamics and phenomena that have not been studied before with
potential technological implications in radio-frequencies and acoustics.
