Optical forces on small particles from partially coherent light

Abstract

We put forward a theory on the optical force exerted upon a dipolar particle by a stationary and ergodic partially coherent light field. We show through a rigorous analysis that the ensemble averaged electromagnetic force is given in terms of a partial gradient of the space variable diagonal elements of the coherence tensor. Further, by following this result we characterize the conservative and non-conservative components of this force. In addition, we establish the propagation law for the optical force in terms of the coherence function of light at a diffraction plane. This permits us to evaluate the effect of the degree of coherence on the force components by using the archetypical configuration of Young's two apertures diffraction pattern, so often employed to characterize coherence of waves.

References in corpus (5)

• Angle-Suppressed Scattering and Optical Forces on Submicron Dielectric Particles
• Radiation pressure and the linear momentum of the electromagnetic field
• Effect of Coherence on Radiation Forces acting on a Rayleigh Dielectric Sphere
• Radiation pressure and the linear momentum of the electromagnetic field in magnetic media
• On optical forces in spherical whispering gallery mode resonators

Cited by in corpus (6)

• Partially coherent sources which produce the same far zone optical force as a laser beam
• Dipole-dipole interaction in random electromagnetic fields
• Optical binding of cylinder photonic molecules in the near-field of partially coherent fluctuating Gaussian Schell model sources. A coherent mode representation
• Light induced "Mock Gravity" at the nanoscale
• Propagation of Partially Coherent Light in non-Hermitian Lattices
• Controlling spatial coherence with an optical complex medium