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Proceedings Paper

Theoretical study of the optical forces and other characteristic parameters in the standing-wave trap
Author(s): Alexandr Jonas; Libor Sramek; Miroslav Liska; Pavel Zemanek
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Paper Abstract

We study theoretically the parameters of the laser trap, created due to the interference of the incident wave and the wave reflected from a dielectric mirror (standing wave trap). We show that (up to our knowledge) this type of the optical trap is the only one which enables 3D optical trapping using a classical (non-inverted) microscope with low N.A. optics. Due to the standing wave nature there are many stable trapping points in this trap so that several objects can be simultaneously trapped along the beam axis. The force and trap stiffness are studied as the functions of the laser beam parameters (beam waist w0, distance of the beam waist from the mirror z0) and particle properties (radius a, relative refractive index nrel). The effect of the structural resonances on the force magnitude is also discussed.

Paper Details

Date Published: 14 July 1999
PDF: 7 pages
Proc. SPIE 3820, 11th Slovak-Czech-Polish Optical Conference on Wave and Quantum Aspects of Contemporary Optics, (14 July 1999); doi: 10.1117/12.353104
Show Author Affiliations
Alexandr Jonas, Technical Univ. of Brno and Institute of Scientific Instruments (Czech Republic)
Libor Sramek, Technical Univ. of Brno and Institute of Scientific Instruments (Czech Republic)
Miroslav Liska, Technical Univ. of Brno (Czech Republic)
Pavel Zemanek, Institute of Scientific Instruments (Czech Republic)


Published in SPIE Proceedings Vol. 3820:
11th Slovak-Czech-Polish Optical Conference on Wave and Quantum Aspects of Contemporary Optics

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