Optimizing optical trap stiffness for Rayleigh particles with a array of Airy beams

TL;DR

This paper explores how arrays of Airy beams can be optimized to enhance optical trapping stability and control over Rayleigh particles by adjusting beam parameters, leveraging their unique non-diffraction and auto-focusing properties.

Contribution

It introduces a method to optimize Airy beam arrays for improved optical trapping of Rayleigh particles, highlighting the influence of beam number and launch angle on trapping stability and force control.

Findings

Increasing the number of beams enhances trapping stability.

Launch angle controls focal point and force distribution.

Airy array beams enable precise manipulation of Rayleigh particles.

Abstract

The Airy array beams are attractive for optical manipulation of particles owing to their non-diffraction and auto-focusing properties. An Airy array beams is composed of $N$ Airy beams which accelerate mutually and symmetrically in opposite direction, for different ballistics trajectories, that is, with different initial launch angles. Based on this, we investigate the optical force distribution acting on Rayleigh particles. Results show that is possible to obtain greater stability, for optical trapping, increasing the number of beams in the array. Also, the intensity focal point and gradient and scattering force of array on Rayleigh particles can be controlled through a launch angle parameter.