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Theoretical comparison of optical traps created by standing wave and single beam
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SYSNO ASEP 0205627 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Ostatní články Title Theoretical comparison of optical traps created by standing wave and single beam Author(s) Zemánek, Pavel (UPT-D) RID, SAI, ORCID
Jonáš, Alexandr (UPT-D) RID, SAI, ORCID
Jákl, Petr (UPT-D) RID, ORCID, SAI
Ježek, Jan (UPT-D) RID, ORCID, SAI
Šerý, Mojmír (UPT-D) RID, SAI
Liška, M. (CZ)Source Title Optics Communications. - : Elsevier - ISSN 0030-4018
Roč. 220, 4-6 (2003), s. 401 - 412Number of pages 12 s. Language eng - English Country NL - Netherlands Keywords single beam trap ; optical trapping ; optical tweezers Subject RIV BH - Optics, Masers, Lasers R&D Projects GA101/00/0974 GA ČR - Czech Science Foundation (CSF) CEZ AV0Z2065902 - UPT-D Annotation We used generalised Lorenz-Mie scattering theory (GLMT) to compare submicron-sized particle optical trapping in a single focused beam and a standing wave. We focus especially on the study of maximal axial trapping force, minimal laser power necessary for confinement, axial trap position, and axial trap stiffness in dependency on trapped sphere radius, refractive index, and Gaussian beam waist size. In the single beam trap (SBT), the range of refractive indices which enable stable trapping depends strongly on the beam waist size (it grows with decreasing waist). On the contrary to the SBT, there are certain sphere sizes (non-trapping radii) that disable spher e confinement in standing wave trap (SWT) for arbitrary value of refractive index. For other sphere radii we show that the SWT enables confinement of high refractive index particle in wider laser beams and provides axial trap stiffness and maximal axial trapping force at least by two orders and one order bigger than in SBT, respectively. Workplace Institute of Scientific Instruments Contact Martina Šillerová, sillerova@ISIBrno.Cz, Tel.: 541 514 178 Year of Publishing 2004
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