• Corpus ID: 119308517

Optical trapping by Laguerre-Gaussian beams: Symmetries, stability and equilibria

  title={Optical trapping by Laguerre-Gaussian beams: Symmetries, stability and equilibria},
  author={Alexei D. Kiselev and Dmytro O. Plutenko},
  journal={arXiv: Optics},
We use the T-matrix formalism in combination with the method of far-field matching to evaluate the optical force exerted by Laguerre-Gaussian (LG) light beams on a spherical (Mie) particle. For both non-vortex and optical vortex LG beams, the theoretical results are used to analyze the optical-force-induced dynamics of the scatterer near the trapping points represented by the equilibrium (zero-force) positions. The regimes of linearized dynamics are described in terms of the stiffness matrix… 


First-order nonconservative motion of optically trapped nonspherical particles.
  • S. Simpson, S. Hanna
  • Physics
    Physical review. E, Statistical, nonlinear, and soft matter physics
  • 2010
An analysis of the first-order nonconservative behavior of nonspherical particles in optical traps is presented and it is shown that they are not suppressed by increases in beam power, although the frequency and amplitude of the cyclic motion will be affected by it.
Direct evidence for three-dimensional off-axis trapping with single Laguerre-Gaussian beam
This work reports the three-dimensional off-axis trapping of dielectric spheres using high-quality LG beams generated by a special holographic method and establishes the scientific groundwork of LG trapping and the technical basis of calibrating optical torque.
Radiation force exerted on a sphere by focused Laguerre-Gaussian beams.
  • Huachao Yu, W. She
  • Physics
    Journal of the Optical Society of America. A, Optics, image science, and vision
  • 2015
The generalized Lorenz-Mie theory is employed to calculate the force exerted on a sphere by focused Laguerre-Gaussian beams, and it is found that low(high)-azimuthal-order beams usually have advantages in the radial trapping of the high(low)-refractive-index sphere and the axial traps of the low( high)- Refractive- index sphere.
Rotation of absorbing spheres in Laguerre-Gaussian beams.
  • S. Simpson, S. Hanna
  • Physics
    Journal of the Optical Society of America. A, Optics, image science, and vision
  • 2009
This system subjects this system to a rigorous analysis involving expansions in vector spherical wave functions that culminates in a simple expression for the torque on the sphere.
Theory of optical trapping by an optical vortex beam.
It is shown that the OV trap can exhibit complex force constants, implying that the trapping must be stabilized by ambient damping.
Optical forces induced behavior of a particle in a non-diffracting vortex beam.
This work study theoretically and experimentally the behavior of a microparticle near the center of an optical vortex beam in a plane perpendicular to the beam propagation and shows that such particle may be stably trapped either in a dark spot on the vortex beam axis, or in one of two points placed off the optical axis.
Influence of nonconservative optical forces on the dynamics of optically trapped colloidal spheres: the fountain of probability.
We demonstrate both experimentally and theoretically that a colloidal sphere trapped in a static optical tweezer does not come to equilibrium, but rather reaches a steady state in which its
Optical forces and torques in nonuniform beams of light.
The spin angular momentum in an elliptically polarized beam of light plays several noteworthy roles in optical traps. It contributes to the linear momentum density in a nonuniform beam, and thus to
Mie scattering of Laguerre-Gaussian beams: photonic nanojets and near-field optical vortices
We study Mie light scattering of Laguerre-Gaussian (LG) beams remodelled using the method of far-field matching. The theoretical results are applied to examine the optical field in the near-field