2015/10/10 by Jai-Min Choi, Heeso Noh · 5 citations
Engineering · Physics and Astronomy · #Anisotropy #Asymmetry #Diffraction #Electromagnetic field #Mie scattering #Near-Field Optical Microscopy #Optical field #Optical force #Optical tweezers #Orbital Angular Momentum in Optics #Polarization (electrochemistry) #Quantum and Classical Electrodynamics #Rayleigh scattering #Scattering #physics.optics
paper · pdf · doi:10.3938/jkps.67.2086
published in Journal of the Korean Physical Society 67(12), 2086-2091 (Springer Science+Business Media) · 16 pages, 5 figures
arxiv created 2015/10/10 · openalex publication_date 2015/12/01 · arxiv updated 2016/01/20 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
In vectorial diffraction theory, tight focusing of a linearly-polarized laser beam produces an anisotropic field distribution around the focal plane. We present a numerical investigation of the electromagnetic field distribution of a focused beam in terms of the input beam’s polarization state and the associated effects on the trap stiffness asymmetry of optical tweezers. We also explore the symmetry change of a polarization-dependent optical force due to the electromagnetic field redistribution in the presence of dielectric spheres of selected diameters ranging from the Rayleigh scattering regime to the Mie scattering regime.