Optical traps formed by different laser modes

To determine the optimum parameters of the laser trap for transparent neutral particles, a computer model of the interaction of tightly focused laser beams of various modes with a transparent dielectric sphere was created based on the laws of the ray and wave optics. In modelling the Laguerre-Gaussians laser modes L-G 1, L-G 2, L-G 3, L-G 4, L-G 0, L-G 0 and L-G 1 and Hermit-Gaussians H-G01, H-G10, H-G11 laser modes 100 0 0 1 2 were used and latex spheres suspended in water were simulated to serve as transparent dielectric particles. For all applied laser modes their forces of action on the sphere are calculated both in axial and transversal directions of the beam propagation. It was revealed that the Laguerre-Gaussians and Hermit-Gaussians beams generate axial reverse forces exceeding those of the zero Gaussian mode. At the same time, the transversal forces of trapping are stronger at the zero Gaussian mode.