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Proceedings Paper

Optical interference fields: an excellent tool kit to study Brownian dynamics
Author(s): Pavel Zemánek; Tomás Čižmár; Martin Šiler
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Paper Abstract

Optical interference of two waves with different wave vectors generates a harmonic spatial profile of the optical intensity. This well known property combined with mechanical effect of light provides an excellent possibility to study the behavior of stochastic system in periodic potentials. Sub-micron size objects dispersed in liquid suffer from noticeable Brownian motion. This free motion can be significantly influenced (directed, suppress, modified) if the objects are illuminated by an optical interference pattern of sufficient intensity. Therefore, the Brownian dynamics in static periodic potentials of variable depth of the potential profile or extra tilt of the potential landscape can be studied. Moreover, applying the principle of optical conveyor combined with a precise method of object tracking with respect to the interference pattern paves the way for similar studies but in motional potential landscapes. We present a group of new experiments studying particle behavior in such fields.

Paper Details

Date Published: 30 August 2006
PDF: 15 pages
Proc. SPIE 6326, Optical Trapping and Optical Micromanipulation III, 632604 (30 August 2006); doi: 10.1117/12.680513
Show Author Affiliations
Pavel Zemánek, Institute of Scientific Instruments (Czech Republic)
Tomás Čižmár, Institute of Scientific Instruments (Czech Republic)
Martin Šiler, Institute of Scientific Instruments (Czech Republic)

Published in SPIE Proceedings Vol. 6326:
Optical Trapping and Optical Micromanipulation III
Kishan Dholakia; Gabriel C. Spalding, Editor(s)

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