Usually a light beam pushes a particle when the photons act upon it. This isdue to that the electric-dipole particle in the paraxial beam is considered. Weinvestigate the scattering forces in non-paraxial gradientless beams and findthat the forces can drag certain particles towards the beam source. The majorcriterion to be carried out to get the attractive force is the strongnon-paraxiality of the light beam. The cone angle denoting the non-paraxialityhas been investigated to unveil its importance on achieving dragging force. Wehope the attractive forces will be very useful in nanoparticle manipulation.
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