Applications of T-Matrix Method in Optical Tweezers and Its Progress

Abstract

The trapping force of the optical tweezers is studied using T-matrix method when the particle is in sizes comparable with the wavelength of the incident light. The T-matrix depends only on the composition、 size、 shape and orientation of particles, independent of the incident field. The basic principles and the calculation methods of T-matrix method are reviewed. The calculations of trapping force and torque of the single particle and two or more particles using T-matrix method are summarized. The prospect provided by T-matrix method for optical tweezers is also analyzed.