Self-oscillations in active wires with asymmetric Willis viscosity

In this talk, we suggest a self-oscillation strategy enabled by asymmetric Willis viscosity. We realize the asymmetric Willis viscosity using active wires and reveal the physical principles underpinning the biased self-oscillation with linear envelope functions. We show the capability of independent tailoring of self-oscillation frequencies and mode shapes as well as standing propagating mode transitions. This work can benefit the understanding of nonstandard self-oscillations in biological and economic systems and prompt the design of autonomous materials, e.g. motors, agitators, pumps, and shakers.