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The Effect of a Silicon Substrate on the Directivity Pattern of Scattered Radiation of a Gold Nanospheroid and on Near-Field Polarization

  • Optics and Spectroscopy. Laser Physics
  • Published:
Moscow University Physics Bulletin Aims and scope

Abstract

We studied the radiation-directivity pattern and the near-field polarization of a spheroidal metallic nanoparticle located over a silicon substrate by interaction with a linearly and circularly polarized field. It is shown that the directivity pattern of the spheroidal particle near the silicon substrate becomes strongly asymmetric and forward scattering is predominant compared with the symmetric diagram of a particle in free space. The change of the near-field polarization of the nanoparticle in presence of the substrate is studied for different wavelengths in the vicinity of the plasmonic resonance. The near-field polarization is described using the generalized Stokes parameters, which allow pictorial visualization of results.

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Authors and Affiliations

  1. Department of Physics, Moscow State University, Moscow, 119991, Russia

    Yu. V. Vladimirova & V. N. Zadkov

  2. International Laser Center, Moscow State University, Moscow, 119991, Russia

    Yu. V. Vladimirova & V. N. Zadkov

  3. Dukhov Research Institute of Automatics (VNIIA), Moscow, 127055, Russia

    A. A. Pavlov

  4. Lebedev Physical Institute, Russian Academy of Sciences, Moscow, 119991, Russia

    A. A. Pavlov

  5. Kolmogorov School, Moscow State University, Moscow, 119991, Russia

    V. N. Zadkov

  6. Institute of Spectroscopy Russian Academy of Sciences, Troitsk, Moscow, 108840, Russia

    V. N. Zadkov

Authors
  1. Yu. V. Vladimirova
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  2. A. A. Pavlov
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  3. V. N. Zadkov
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Corresponding author

Correspondence to Yu. V. Vladimirova.

Additional information

Original Russian Text © Yu.V. Vladimirova, A.A. Pavlov, V.N. Zadkov, 2017, published in Vestnik Moskovskogo Universiteta, Seriya 3: Fizika, Astronomiya, 2017, No. 6, pp. 49–55.

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Vladimirova, Y.V., Pavlov, A.A. & Zadkov, V.N. The Effect of a Silicon Substrate on the Directivity Pattern of Scattered Radiation of a Gold Nanospheroid and on Near-Field Polarization. Moscow Univ. Phys. 72, 544–549 (2017). https://doi.org/10.3103/S0027134917060170

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  • DOI: https://doi.org/10.3103/S0027134917060170

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