Simulation of active Brownian particles in optical potentials

Giorgio Volpe; Sylvain Gigan; Giovanni Volpe

doi:10.1117/12.2061049

16 September 2014 Simulation of active Brownian particles in optical potentials

Giorgio Volpe, Sylvain Gigan, Giovanni Volpe

Proceedings Volume 9164, Optical Trapping and Optical Micromanipulation XI; 91642S (2014) https://doi.org/10.1117/12.2061049
Event: SPIE NanoScience + Engineering, 2014, San Diego, California, United States

Abstract

Optical forces can affect the motion of a Brownian particle. For example, optical tweezers use optical forces to trap a particle at a desirable position. Unlike passive Brownian particles, active Brownian particles, also known as microswimmers, propel themselves with directed motion and thus drive themselves out of equilibrium. Understanding their motion in a confined potential can provide insight into out-of-equilibrium phenomena associated with biological examples such as bacteria, as well as with artificial microswimmers. We discuss how to mathematically model their motion in an optical potential using a set of stochastic differential equations and how to numerically simulate it using the corresponding set of finite difference equations.

Citation Download Citation

Giorgio Volpe, Sylvain Gigan, and Giovanni Volpe "Simulation of active Brownian particles in optical potentials", Proc. SPIE 9164, Optical Trapping and Optical Micromanipulation XI, 91642S (16 September 2014); https://doi.org/10.1117/12.2061049

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