Non-spherical particles in optical tweezers: A numerical solution


Autoři: Joonas Herranen aff001;  Johannes Markkanen aff002;  Gorden Videen aff003;  Karri Muinonen aff001
Působiště autorů: Department of Physics, University of Helsinki, Finland aff001;  Max Planck Institute for Solar System Research, Göttingen, Germany aff002;  Army Research Laboratory, Adelphi, Maryland, United States of America aff003;  Space Science Institute, Boulder, Colorado, United States of America aff004;  Kyung Hee University, Gyeonggi-do, South Korea aff005;  Finnish Geospatial Research Institute FGI, National Land Survey, Finland aff006
Vyšlo v časopise: PLoS ONE 14(12)
Kategorie: Research Article
prolekare.web.journal.doi_sk: 10.1371/journal.pone.0225773

Souhrn

We present numerical methods for modeling the dynamics of arbitrarily shaped particles trapped within optical tweezers, which improve the predictive power of numerical simulations for practical use. We study the dependence of trapping on the shape and size of particles in a single continuous wave beam setup. We also consider the implications of different particle compositions, beam types and media. The major result of the study is that for different irregular particle shapes, a range of beam powers generally leads to trapping. The trapping power range depends on whether the particle can be characterized as elongated or flattened, and the range is also limited by Brownian forces.

Klíčová slova:

Ellipsoids – Inertia – Optical materials – Velocity – Drag – Brownian motion – Moment of inertia – Particle spin


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2019 Číslo 12