Light scattering of Laguerre-Gaussian beams: near-field structures and symmetries
https://doi.org/10.17586/2220-8054-2016-7-2-349-370
Abstract
We apply the method of far-field matching to remodel laser beams and study light scattering from spherical particles illuminated by a Laguerre-Gaussian (LG) light beam. The optical field in the near-field region is analyzed for purely azimuthal LG beams characterized by a nonzero azimuthal mode number mLG. The morphology of photonic nanojets is shown to significantly vary, depending the mode number and the scatterer’s characteristics. The cases of negative index metamaterial and metallic Mie scatterers are discussed. We also discuss the symmetry properties of laser beams and related results for the optical forces. The near-field structure of optical vortices associated with the components of the electric field, being highly sensitive to the mode number, is found to be determined by the twofold rotational symmetry.
Supporting agencies: A.D.K. acknowledges partial financial support from the Government of the Russian Federation (Grant No. 074-U01), from the Ministry of Education and Science of the Russian Federation (Grant No. GOSZADANIE 2014/190, Project No. 14.Z50.31.0031, and ZADANIE Grant No. 1.754.2014/K), through a grant from the Russian Foundation for Basic Research, and through a grant from the President of Russia (Grant No. MK-2736.2015.2).
About the Authors
A. D. Kiselev
ITMO University
Russian Federation
Russian Federation
Kronverkskiy, 49, St. Petersburg, 197101
D. O. Plutenko
Institute of Physics of National Academy of Sciences of Ukraine; Physical Engineering Teaching Research Center of National Academy of Sciences of Ukraine
Ukraine
Ukraine
Kiev
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For citations:
Kiselev A.D., Plutenko D.O. Light scattering of Laguerre-Gaussian beams: near-field structures and symmetries. Nanosystems: Physics, Chemistry, Mathematics. 2016;7(2):349-370. https://doi.org/10.17586/2220-8054-2016-7-2-349-370
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