Acoustics of finite-aperture vortex beams
arXiv:1405.1060 · doi:10.1109/TUFFC.2014.006498
Abstract
A method based on the Rayleigh-Sommerfeld surface integral is provided, which makes it feasible to rigorously model, evaluate and compute the acoustic scattering and other mechanical effects of finite-aperture vortex beams such as the acoustic radiation force and torque on a viscoelastic sphere in various applications in acoustic tweezers and microfluidics, particle entrapment, manipulation and rotation. Partial-wave series expansions are derived for the incident field of acoustic spiraling (vortex) beams, comprising high-order Bessel and Bessel-Gauss beams.
10th Int. Conf. on Laser-light and Interactions with Particles, Marseille, France, August 25-29th, 2014