Selective Induction of Optical Magnetism

Uttam Manna, Jung Hoon Lee, Tian Song Deng, John Parker, Nolan Shepherd, Yossi Weizmann, Norbert F. Scherer

Research output: Contribution to journalArticlepeer-review

30 Scopus citations


An extension of the Maxwell-Faraday law of electromagnetic induction to optical frequencies requires spatially appropriate materials and optical beams to create resonances and excitations with curl. Here we employ cylindrical vector beams with azimuthal polarization to create electric fields that selectively drive magnetic responses in dielectric core-metal nanoparticle "satellite" nanostructures. These optical frequency magnetic resonances are induced in materials that do not possess spin or orbital angular momentum. Multipole expansion analysis of the scattered fields obtained from electrodynamics simulations show that the excitation with azimuthally polarized beams selectively enhances magnetic vs electric dipole resonances by nearly 100-fold in experiments. Multipolar resonances (e.g., quadrupole and octupole) are enhanced 5-fold by focused azimuthally versus linearly polarized beams. We also selectively excite electric multipolar resonances in the same identical nanostructures with radially polarized light. This work opens new opportunities for spectroscopic investigation and control of "dark modes", Fano resonances, and magnetic modes in nanomaterials and engineered metamaterials.

Original languageEnglish
Pages (from-to)7196-7206
Number of pages11
JournalNano Letters
Issue number12
StatePublished - 13 Dec 2017
Externally publishedYes


  • FDTD simulations
  • Optical magnetism
  • cylindrical vector beams
  • meta-atom
  • multipolar resonances
  • plasmonic nanocluster

ASJC Scopus subject areas

  • Bioengineering
  • Chemistry (all)
  • Materials Science (all)
  • Condensed Matter Physics
  • Mechanical Engineering


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