期刊
PHYSICAL REVIEW LETTERS
卷 95, 期 16, 页码 -出版社
AMERICAN PHYSICAL SOC
DOI: 10.1103/PhysRevLett.95.168102
关键词
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The first quantitative agreement between measured and calculated stiffnesses of optically trapped particles in the subwavelength regime is presented. It is shown for all three dimensions that the measured extent of harmonic optical trapping potentials for dielectric spheres comes very close to the theoretically predicted extent, provided all known instrumental parameters are considered. The recently predicted strong asymmetry of the trapping potential due to the electric field's linear polarization has been verified in all three directions. This effect vanishes for spheres with diameters d approximate to lambda, which exhibit the strongest trap stiffnesses.
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