Theoretical analysis on particle manipulation of the optical tweezers arrays system

摘要

In biological scientific research, separating biological macromolecules or cells in liquid is always a challenging job. Optical tweezers have been a valuable research tool since their invention in the 1980s. One of the most important developments in optical tweezers in recent years has been the creation of two-dimensional arrays of optical traps. In this paper, a method based on interference is discussed to form the gradient laser fields, which may cause spatial modulation of the concentration of particles. The parameters related with the optical tweezers array are discussed in detail and simulated by Matlab software to show the impact factor of the important parameters for the concentration distribution of the particles. The spatial redistribution of particles in a laser interference field could be also predicted according the theoretical analysis.