Simulation of forces on Mie micro-particles in laser trap

Xiao-na Wang; Jian Bai; Tian-tai Guo; Bo Fang

doi:10.1117/12.810450

12 January 2009 Simulation of forces on Mie micro-particles in laser trap

Xiao-na Wang, Jian Bai, Tian-tai Guo, Bo Fang

Proceedings Volume 7133, Fifth International Symposium on Instrumentation Science and Technology; 71334D (2009) https://doi.org/10.1117/12.810450
Event: International Symposium on Instrumentation Science and Technology, 2008, Shenyang, China

Abstract

This paper concerns the mathematical model and simulation of forces on Mie micro-particles in laser trap. To make the mathematical models suitable for particles with arbitrary shape, the surface of Mie particle is divided into many microplanes, then the radiation pressure resulting from the interaction between a single incident light and a micro-plane and a individual ray tracing is obtained using the geometrical optical theory. A computer simulation program based on this mathematical model is designed to calculate the trapping force on Mie micro-particles with arbitrary shape (sphere, cone, polyhedron and particle with smooth surface).The simulation result for the trapping forces of spherical particles is consistent with that in reference [1], and comparisons are made between spherical particles and spherical particles reconstructed from NURBS, and between conical particles and conical particles reconstructed from polyhedron. These results verify the simulation program, so it can be an effective design and analysis tool for the application of laser trapping in nanometer testing and manufacturing.

Citation Download Citation

Xiao-na Wang, Jian Bai, Tian-tai Guo, and Bo Fang "Simulation of forces on Mie micro-particles in laser trap", Proc. SPIE 7133, Fifth International Symposium on Instrumentation Science and Technology, 71334D (12 January 2009); https://doi.org/10.1117/12.810450

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