Evaluation of E. M. fields and energy transport in metallic nanoparticles with near field excitation

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Abstract

We compare two ways of calculating the optical response of metallic nanoparticles illuminated by near field dipole sources. We develop tests to determine the accuracy of the calculations of internal and scattered fields of metallic nanoparticles at the boundary of the particles and in the far field. We verify the correct transport of energy by checking that the evaluation of the energy flux agrees at the surface of the particles and in the far field. A new test is introduced to check that the surface fields fulfill Maxwell's equations allowing evaluation of the validity of the internal field. Calculations of the scattering cross section show a faster rate of convergence for the principal mode theory. We show that for metallic particles the internal field is the most significant source of error.
Original languageEnglish
Pages (from-to)564-575
Number of pages12
JournalPhysical Science International Journal
Volume4
Issue number4
Early online date6 Jan 2014
DOIs
Publication statusPublished - May 2014

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near fields
nanoparticles
far fields
evaluation
excitation
Maxwell equation
scattering cross sections
energy
dipoles

Keywords

  • nanoparticles
  • electromagnetic scattering
  • energy flux
  • nanophotonics

Cite this

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title = "Evaluation of E. M. fields and energy transport in metallic nanoparticles with near field excitation",
abstract = "We compare two ways of calculating the optical response of metallic nanoparticles illuminated by near field dipole sources. We develop tests to determine the accuracy of the calculations of internal and scattered fields of metallic nanoparticles at the boundary of the particles and in the far field. We verify the correct transport of energy by checking that the evaluation of the energy flux agrees at the surface of the particles and in the far field. A new test is introduced to check that the surface fields fulfill Maxwell's equations allowing evaluation of the validity of the internal field. Calculations of the scattering cross section show a faster rate of convergence for the principal mode theory. We show that for metallic particles the internal field is the most significant source of error.",
keywords = "nanoparticles, electromagnetic scattering, energy flux, nanophotonics",
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AU - McArthur, Duncan

AU - Hourahine, Benjamin

AU - Papoff, Francesco

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N2 - We compare two ways of calculating the optical response of metallic nanoparticles illuminated by near field dipole sources. We develop tests to determine the accuracy of the calculations of internal and scattered fields of metallic nanoparticles at the boundary of the particles and in the far field. We verify the correct transport of energy by checking that the evaluation of the energy flux agrees at the surface of the particles and in the far field. A new test is introduced to check that the surface fields fulfill Maxwell's equations allowing evaluation of the validity of the internal field. Calculations of the scattering cross section show a faster rate of convergence for the principal mode theory. We show that for metallic particles the internal field is the most significant source of error.

AB - We compare two ways of calculating the optical response of metallic nanoparticles illuminated by near field dipole sources. We develop tests to determine the accuracy of the calculations of internal and scattered fields of metallic nanoparticles at the boundary of the particles and in the far field. We verify the correct transport of energy by checking that the evaluation of the energy flux agrees at the surface of the particles and in the far field. A new test is introduced to check that the surface fields fulfill Maxwell's equations allowing evaluation of the validity of the internal field. Calculations of the scattering cross section show a faster rate of convergence for the principal mode theory. We show that for metallic particles the internal field is the most significant source of error.

KW - nanoparticles

KW - electromagnetic scattering

KW - energy flux

KW - nanophotonics

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JO - Physical Science International Journal

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