Determining polarizability tensors for an arbitrary small electromagnetic scatterer

Viktar S. Asadchy, Igar A. Faniayeu, Younes Ra'Di, Sergei A. Tretyakov

Research output: Contribution to journalArticlepeer-review

72 Scopus citations


In this paper, we present a method to retrieve tensor polarizabilities of general bi-anisotropic particles from their far-field responses to plane-wave illuminations. The necessary number of probing excitations and the directions where the scattered fields need to be calculated or measured have been found. When implemented numerically, the method does not require any spherical harmonic expansion nor direct calculation of dipole moments, but only calculations of co- and cross-polarized scattering cross sections for a number of plane-wave excitations. With this simple approach, the polarizabilities can be found also from experimentally measured cross sections. The method is exemplified considering two bi-anisotropic particles, a reciprocal omega particle and a non-reciprocal particle containing a ferrite inclusion coupled to metal strips.

Original languageEnglish (US)
Pages (from-to)298-304
Number of pages7
JournalPhotonics and Nanostructures - Fundamentals and Applications
Issue number4
StatePublished - Aug 2014
Externally publishedYes


  • Bi-anisotropic particle
  • Dipole moments
  • Polarizability
  • Scattered fields

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Condensed Matter Physics
  • Hardware and Architecture
  • Electrical and Electronic Engineering


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