Stability and Heating of a Micro-Particle Trapped by Optical Tweezers: FEM Analysis Using Comsol Multiphysics

0452606 - ÚPT 2016 CZ eng A - Abstract
Šiler, Martin - Zemánek, Pavel
Stability and Heating of a Micro-Particle Trapped by Optical Tweezers: FEM Analysis Using Comsol Multiphysics.
Technical Computing Prague 2015. Sborník příspěvků. Praha: Humusoft, 2015.
[Technical Computing Prague 2015. 04.11.2015, Praha]
R&D Projects: GA ČR GB14-36681G
Institutional support: RVO:68081731
Subject RIV: BH - Optics, Masers, Lasers

Optical tweezers (OT) are scientic instruments that use a highly focused laser beam to provide an attractive or repulsive force (on the order of piconewtons), to physically hold and move microscopic objects similar to tweezers. OT have been originally developed by A. Ashkin 30 years ago and has been particularly successful in studying a variety of biological systems in recent years. The possibility to trap particles into OT is governed by a transfer of momentum between light and matter with the key mechanism being the light scattering. Many methods has been used in order to calculate distribution of scattered light and optical forces. Mostly used are Generalized Lorenz-Mie theory (GLMT), T-Matrix and Coupled dipoles method. However, even Finite Elements Method (FEM) might be used as well. Especially FEM is unique in an ability to combine calculations of optical forces with other physical effects such as heating, temperature distribution, fluid flows, electro-osmotic effects, etc.
Permanent Link: http://hdl.handle.net/11104/0253565