Juggling with Light.

@article{Bae2019JugglingWL,
  title={Juggling with Light.},
  author={Albert J. Bae and Dag Hanstorp and Kelken Chang},
  journal={Physical review letters},
  year={2019},
  volume={122 4},
  pages={
          043902
        }
}
We discovered that when a pair of small particles is optically levitated, the particles execute a "dance" whose motion resembles the orbits of balls being juggled. This motion lies in a plane perpendicular to the polarization of the incident light. We ascribe the dance to a mechanism by which the dominant force on each particle cyclically alternates between radiation pressure and gravity as each particle takes turns eclipsing the other. We explain the plane of motion by considering the… 

Figures from this paper

A microsphere molecule: The interaction of two charged microspheres in a magneto-gravitational trap

Optomechanical systems composed of levitated particles in vacuum provide excellent conditions to test the predictions of both classical and quantum physics. While similar in approach, differing

Machine learning reveals complex behaviours in optically trapped particles

It is demonstrated that machine learning permits one to combine the speed of the harmonic model with the accuracy of optical-scattering models, and it is shown that a neural network can be trained to rapidly and accurately predict the optical forces acting on a microscopic particle.

Observation of FRET in collision of droplets

Förster Resonance Energy Transfer (FRET) is a radiationless distance-dependent transfer of energy from an excited donor fluorophore to an acceptor fluorophore. This radiationless interaction of a

References

SHOWING 1-10 OF 29 REFERENCES

Regular oscillations and random motion of glass microspheres levitated by a single optical beam in air.

The low loss for the center of mass motion of the beads could allow this system to serve as a standard many body testbed, similar to what is done today with atoms, but at the mesoscopic scale.

Optical Levitation by Radiation Pressure

The stable levitation of small transparent glass spheres by the forces of radiation pressure has been demonstrated experimentally in air and vacuum down to pressures ∼1 Torr. A single vertically

Optical Levitation of Liquid Drops by Radiation Pressure

The levitation technique has been extended toward smaller particles, lower laser power, and deeper traps, and the techniques developed here have particular importance in cloud physics, aerosol science, fluid dynamics, and optics.

Stability of optical levitation by radiation pressure

Stable optical levitation of transparent hollow dielectric spheres has been demonstrated using TEM01 mode laser beams. The levitation of solid dielectric spheres has been made much more stable using

Laser acceleration of absorbing particles.

A fundamental system of coupled differential equations to track particle momentum, velocity, mass, radius, temperature, vapor opacity, and temperature distribution is developed and shown to accurately model the trajectories and lifetimes of laser heated particles.

Hydrodynamic interactions in two dimensions.

It is found that at a hundred radii distance, the mobilities for rigid and relative motions differ by a factor of 2, whereas in bulk fluids, they would be practically indistinguishable.

Acceleration and trapping of particles by radiation pressure

Micron-sized particles have been accelerated and trapped in stable optical potential wells using only the force of radiation pressure from a continuous laser. It is hypothesized that similar

Observation of a single-beam gradient force optical trap for dielectric particles.

Optical trapping of dielectric particles by a single-beam gradient force trap was demonstrated for the first reported time. This confirms the concept of negative light pressure due to the gradient

Transient trapping of two microparticles interacting with optical tweezers and cavitation bubbles

In this work we show that two absorbing microbeads can briefly share the same optical trap while creating microscopic explosions. Optical forces pull the particles towards the waist of the trapping