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Proceedings Paper

Particle escape over a potential barrier in 1D optical potential energy landscape
Author(s): Martin Šiler; Pavel Zemánek
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Paper Abstract

We address the problem of the stochastic particle transitions between stable positions in a one-dimensional periodic potential profile. With respect to the experimental realization such stable positions are represented by the optical traps formed in a standing wave. The behavior of sub-micrometer sized particles in this "optical potential energy landscape" is analyzed theoretically and experimentally and the stress is put on the particles jumps between the neighboring optical traps. Our theoretical model assumes over-damped stochastic motion of a particle in a finite-depth potential well. Subsequently, Mean First Passage Time is utilized to express the new quantity called the Mean Optical Trap Escape Time (MOTET) that describes the mean time of the particle escape to a neighboring stable position (optical trap).

Paper Details

Date Published: 27 August 2010
PDF: 8 pages
Proc. SPIE 7762, Optical Trapping and Optical Micromanipulation VII, 776214 (27 August 2010);
Show Author Affiliations
Martin Šiler, Institute of Scientific Instruments of the ASCR, v.v.i. (Czech Republic)
Pavel Zemánek, Institute of Scientific Instruments of the ASCR, v.v.i. (Czech Republic)

Published in SPIE Proceedings Vol. 7762:
Optical Trapping and Optical Micromanipulation VII
Kishan Dholakia; Gabriel C. Spalding, Editor(s)

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