Design of interdigitated transducers for acoustofluidic applications

Interdigitated transducers (IDTs) were originally designed as delay lines for radars. Half a century later, they have found new life actuators microfluidic systems. By generating strong acoustic fields, trigger nonlinear effects that enable pumping and mixing of fluids, moving particles without contact. However, the transition from signal processing to comes with range challenges concerning power density spatial resolution spurred exciting developments in solid-state acoustics especially IDT design. Assuming some familiarity acoustofluidics, this paper aims provide tutorial design characterization purpose acoustofluidic actuation. It is targeted at diverse audience researchers various including fluid mechanics, acoustics, microelectronics.