Lorentz–gauss Beams In Trapping Particles And Cells

Due to the special transmission characteristics,Lorentz-Gauss beams can focus on the particles and cells and produce radiant power in a particular plane which has obvious advantages and development prospects in the trapping and manipulating of various kinds of particles and biological cells.This paper studies the micro-particle catch and manipulation of the Lorentz-Gauss beams in theory and experiment.First,this paper introduces the calculation and simulation about the orbital angular momentum of the vortex Lorentz-Gauss beams through a paraxial ABCD optical system,the orbital angular momentum of the vortex Lorentz-Gauss beams which has 1topological charge through a non-paraxial transmission and the orbital angular momentum of any vortex Lorentz-Gauss beams through a non-paraxial transmission.Then,this paper analysis the Lorentz-Gauss beams and the Lorentz-Hermitian-Gauss beams for the capture of the Rayleigh particles by the method of numerical simulation.Finally,based on OTKB/m optical tweezers system which comprises the Thorlabs lens cannula and cage component,the yeast cells(~10μm),glass beads(~8μm)and polystyrene microspheres(~4μm)are trapped and manipulated succeed.What’s more,to expand the application of optical tweezers system in biophysical interdisciplinary,this paper also briefly analyzes the the interference factors of particles and cells trapping on the basis of experiment.