Theoretical study of the optical forces and other characteristic parameters in the standing-wave trap

Alexandr Jonas; Libor Sramek; Miroslav Liska; Pavel Zemanek

doi:10.1117/12.353104

14 July 1999 Theoretical study of the optical forces and other characteristic parameters in the standing-wave trap

Alexandr Jonas, Libor Sramek, Miroslav Liska, Pavel Zemanek

Proceedings Volume 3820, 11th Slovak-Czech-Polish Optical Conference on Wave and Quantum Aspects of Contemporary Optics; (1999) https://doi.org/10.1117/12.353104
Event: Eleventh Slovak-Czech-Polish Optical Conference on Wave and Quantum Aspects of Contemporary Optics, 1998, Stara Lesna, Slovakia

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 n_rel). The effect of the structural resonances on the force magnitude is also discussed.

Citation Download Citation

Alexandr Jonas, Libor Sramek, Miroslav Liska, and Pavel Zemanek "Theoretical study of the optical forces and other characteristic parameters in the standing-wave trap", Proc. SPIE 3820, 11th Slovak-Czech-Polish Optical Conference on Wave and Quantum Aspects of Contemporary Optics, (14 July 1999); https://doi.org/10.1117/12.353104

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