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Updated: May 15, 2026
06:51
Microparticle Manipulation by Standing Surface Acoustic Waves with Dual-frequency Excitations
Published on: August 21, 2018
Three-dimensional acoustic radiation force on an arbitrarily located elastic sphere
Diego Baresch1, Jean-Louis Thomas, Régis Marchiano
1UPMC Univ Paris 06, UMR 7588, Institut des NanoSciences de Paris, F-75005, Paris, France.
The Journal of the Acoustical Society of America
|January 10, 2013
Summary
This study models acoustic forces on elastic spheres using Bessel beams, demonstrating their potential as tractor beams for particle manipulation. Researchers explored forces and equilibrium positions, confirming pseudo-angular momentum transfer.
Area of Science:
- Acoustics
- Fluid Dynamics
- Wave Physics
Background:
- Acoustic radiation forces are crucial for understanding wave-matter interactions.
- Elastic spheres in fluids experience forces from acoustic fields.
- Bessel beams, with unique phase singularities, offer novel manipulation capabilities.
Purpose of the Study:
- To model acoustic radiation forces on an elastic sphere in an inviscid fluid.
- To analyze the axial and transverse forces exerted by arbitrary acoustic fields.
- To investigate the application of Bessel beams as tractor beams for particle manipulation.
Main Methods:
- Derivation of expressions for axial and transverse forces.
- Analysis based on scattering of acoustic fields expanded in spherical coordinates.
- Consideration of high-order Bessel beams (acoustical vortices) with helicoidal wavefronts.
Main Results:
- Established expressions for acoustic forces on arbitrarily located elastic spheres.
- Identified radial equilibrium positions dependent on sphere radius.
- Demonstrated pseudo-angular momentum transfer from Bessel beams to spheres, inducing rotation.
- Investigated axial forces opposing beam propagation, confirming tractor beam potential.
Conclusions:
- Bessel beams can exert forces on elastic spheres, leading to equilibrium positions and rotation.
- The study confirms the potential of Bessel beams as tractor beams.
- Findings support the development of acoustic tweezers for particle manipulation and entrapment.
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