Number of the records: 1
Simplified description of optical forces acting on a nanoparticle in the Gaussian standing wave
- 1.
SYSNO ASEP 0205469 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Ostatní články Title Simplified description of optical forces acting on a nanoparticle in the Gaussian standing wave Author(s) Zemánek, Pavel (UPT-D) RID, SAI, ORCID
Jonáš, Alexandr (UPT-D) RID, SAI, ORCID
Liška, M. (CZ)Source Title Optical Society of America. Journal A: Optics, Image Science, and Vision - ISSN 0740-3232
Roč. 19, č. 5 (2002), s. 1025 - 1034Number of pages 10 s. Language eng - English Country US - United States Keywords Gaussian tanding wave 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) CEZ AV0Z2065902 - UPT-D Annotation We study the axial force acting on dielectric spherical particles smallerthan the trapping wavelength that are placed in the Gaussian standing wave. We derive analytical formulas for immersed particles with relative refractive indices close to unity and compare them with the numerical results obtained by generalized Lorenz-Mie theory (GLMT). We show that the axial optical force depends periodically on the particle size and that the equilibrium position of the particle alternates between the standing-wave antinodes and nodes. For certain particle sizes, gradient forces from the neighboring antinodes cancel each other and disable particle confinement. Using the GLMT we compare maximum axial trapping forces provided by the Gaussianstanding wave trap (SWT) and single-beam trap (SBT) as a function of particle size, refractive index, and beam waist size. Workplace Institute of Scientific Instruments Contact Martina Šillerová, sillerova@ISIBrno.Cz, Tel.: 541 514 178 Year of Publishing 2003
Number of the records: 1