Transfer of angular momentum to matter from acoustical vortices in free space
Por:
Volke-Sepulveda, K, Santillan, AO, Boullosa, RR
Publicada:
18 ene 2008
Categoría:
Physics and Astronomy (miscellaneous)
Resumen:
An experimental demonstration of the mechanical transfer of orbital angular momentum to matter from acoustical vortices in free field is presented. Vortices with topological charges l=+/- 1 and l=+/- 2 were generated and a torsion pendulum was used to study the angular momentum transfer to hanging disks of several sizes. This allowed us to make a comparative study of the effective acoustical torque in terms of topological charge of the vortex, the disk radius, and its position along the main propagation axis. A theoretical discussion of the generated sound fields is also provided.
Filiaciones:
Univ Nacl Autonoma Mexico, Inst Fis, Mexico City 01000, DF, Mexico
Univ Nacl Autonoma Mexico, Ctr Ciencias Aplicadas & Desarrollo Tecnol, Mexico City 04510, DF, Mexico
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