Abstract
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.
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Choi, JM., Noh, H. Investigation of the polarization-dependent optical force in optical tweezers by using generalized Lorenz-Mie theory. Journal of the Korean Physical Society 67, 2086–2091 (2015). https://doi.org/10.3938/jkps.67.2086
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DOI: https://doi.org/10.3938/jkps.67.2086