Interaction of tightly focused laser beam with transparent dielectric particles in the shape of ellipsoid of revolution

The computer model of interaction of a tightly focused laser beam with transparent dielectric particles in the shape of ellipsoid of revolution of the sizes > 10(lambda) was created. For a zero Gaussian mode the interaction with latex particles weighed in water was simulated. For these particular particles the forces exerted by Gaussian beam in a longitudinal direction were calculated. It was revealed that the particles flattened out along the axis of the beam propagation were better trapped, than the longitudinal ones. It was found, that the behavior of the trapping force acting on the longitudinal particles is influenced by the total reflection arising at the light propagation inside a particle.