Revisiting the physics of Fano resonances for nanoparticle oligomers

Ben Hopkins, Alexander N. Poddubny, Andrey E. Miroshnichenko, Yuri S. Kivshar

Research output: Contribution to journalArticlepeer-review


We present a robust approach for interpreting the physics of Fano resonances in planar oligomer structures of both metallic and dielectric nanoparticles. We reveal a key mechanism for Fano resonances by demonstrating that such resonances can be generated purely from the interference of nonorthogonal collective eigenmodes, which are clearly identified based on the coupled-dipole approximation. We prove analytically a general theorem to identify the number of collective eigenmodes that can be excited in ring-type nanoparticle oligomers and further demonstrate that no dark-mode excitation is necessary for the existence of Fano resonances in symmetric oligomers. As a consequence, we unify the understanding of Fano resonances for both plasmonic and all-dielectric oligomers.

Original languageEnglish
Article number053819
JournalPhysical Review A - Atomic, Molecular, and Optical Physics
Issue number5
StatePublished - 14 Nov 2013
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics


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