The development of photonics and plasmonics has seen electromagnetic evanescent waves being used for diverse applications from trapping small particles to illumination in biological applications. As an equivalent to the optics counterpart, the authors report on the generation of an acoustic evanescent Bessel field for acoustofluidic applications that only requires a single piezoelectric element in a sub-wavelength resonant cavity and that can be used to attract or repel particles and cells using acoustic radiation force.
- Pierre-Yves Gires
- Cédric Poulain
