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Single-beam Trapping in Front of Reflective Surfaces
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SYSNO ASEP 0205399 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Ostatní články Title Single-beam Trapping in Front of Reflective Surfaces Author(s) Jonáš, Alexandr (UPT-D) RID, SAI, ORCID
Zemánek, Pavel (UPT-D) RID, SAI, ORCID
Florin, E. L. (DE)Source Title Optics Letters. - : Optical Society of America - ISSN 0146-9592
Roč. 26, č. 19 (2001), s. 1466-1468Number of pages 3 s. Language eng - English Country US - United States Keywords optical trapping ; standing wave ; two-photon-excited fluorescence Subject RIV BH - Optics, Masers, Lasers R&D Projects GA101/98/P106 GA ČR - Czech Science Foundation (CSF) GA202/99/0959 GA ČR - Czech Science Foundation (CSF) GA101/00/0974 GA ČR - Czech Science Foundation (CSF) IAC1065004 GA AV ČR - Academy of Sciences of the Czech Republic (AV ČR) CEZ AV0Z2065902 - UPT-D Annotation We show that the optical trapping of dielectric particles by a single focused beam in front of a weakly reflective surface is considerably affected by interference of the incident and reflected beams, which creates a standing-wave component of the total field. We use the two-photon-excited fluorescence from a trapped dyed probe to detect changes in the distance between the trapped beam focus as the focus approaches the reflective surface. This procedure enables us to determine the relative strengths of the single-beam and the standing-wave trapping forces. We demonstrate that, even for reflection from a glass-water interface, standing-wave trapping dominates, as far as 5 ćm from the surface. Workplace Institute of Scientific Instruments Contact Martina Šillerová, sillerova@ISIBrno.Cz, Tel.: 541 514 178 Year of Publishing 2002
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