ACOUSTIC TWEEZERS

摘要

An electroacoustic device includes at least one precursor wave transducer. The at least one precursor wave transducer includes a piezoelectric substrate, and first and second electrodes of inverse polarity arranged on the substrate and configured to generate in the substrate a precursor ultrasonic surface wave which is unfocused. When a fluid medium is acoustically coupled with the electroacoustic device, the precursor ultrasonic surface wave propagates as a volume acoustic wave into the bulk of the fluid medium and focuses therein.