Optical Sorting of Dielectric Spheres in a Standing Wave Calculated with Effective Velocities and Diffusion Constants

Published

September 7, 2016

Author(s)

Zachary H. Levine, John J. Curry

Abstract

Recently, as part of a study of the ability of a Gaussian standing-wave interference field to sort small dielectric particles entrained in a moving fluid, we implemented a two-length-scale method to determine the trajectories of the particles. In the first step, effective velocities and diffusion constants are determined by solving the Fokker-Planck equation in a force field determined by the Maxwell stress tensor. In the second step, these effective constants of motion are used to predict positions of particles swept across the interference field. Here, we present the code which was used in a companion article (Curry and Levine, G2016-0170).

Citation

Journal of Research (NIST JRES) -

NIST Pub Series

Journal of Research (NIST JRES)

Pub Type

NIST Pubs

Download Paper

https://doi.org/10.18434/T4SW26

Keywords

standing-wave interference field , effective velocity , optical sorting

Citation

Levine, Z. and Curry, J. (2016), Optical Sorting of Dielectric Spheres in a Standing Wave Calculated with Effective Velocities and Diffusion Constants, Journal of Research (NIST JRES), National Institute of Standards and Technology, Gaithersburg, MD, [online], https://doi.org/10.18434/T4SW26 (Accessed October 21, 2025)