najoNanosystems: Physics, Chemistry, MathematicsНаносистемы: физика, химия, математика2220-80542305-7971Университет ИТМО10.17586/2220-8054-2016-7-2-349-370najo-834Research ArticleCONTRIBUTED TALKSCONTRIBUTED TALKSLight scattering of Laguerre-Gaussian beams: near-field structures and symmetriesLight scattering of Laguerre-Gaussian beams: near-field structures and symmetriesKiselevA. D.KiselevA. D.

Kronverkskiy, 49, St. Petersburg, 197101

Kronverkskiy, 49, St. Petersburg, 197101

alexei.d.kiselev@gmail.comPlutenkoD. O.PlutenkoD. O.

Kiev

Kiev

dmplutenko@gmail.comITMO UniversityITMO UniversityInstitute of Physics of National Academy of Sciences of Ukraine; Physical Engineering Teaching Research Center of National Academy of Sciences of UkraineInstitute of Physics of National Academy of Sciences of Ukraine; Physical Engineering Teaching Research Center of National Academy of Sciences of Ukraine20161308202572Special Issue349370Copyright © Kiselev A.D., Plutenko D.O., 20252025Kiselev A.D., Plutenko D.O.Kiselev A.D., Plutenko D.O.Данная работа распространяется под лицензией Creative Commons Attribution 4.0.This work is licensed under a Creative Commons Attribution 4.0 License.https://nanojournal.ifmo.ru/jour/article/view/834

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.

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.

light scatteringLaguerre-Gaussian beamsphotonic nanojetsoptical vorticeslight scatteringLaguerre-Gaussian beamsphotonic nanojetsoptical vorticesA.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).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).ReferencesMie G. 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The authors declare that there are no conflicts of interest present.