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Transfer of Angular Momentum to Matter from Acoustical Vortices in Free Space
2008
Physical Review Letters
Preserved Fulltext
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
doi:10.1103/physrevlett.100.024302
pmid:18232874
fatcat:wmnzwzsczzgillfui2g4g6zwmm