Electric dipole-free interaction of visible light with pairs of subwavelength-size silver particles

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In subwavelength-sized particles, light-induced multipole moments of orders higher than the electric dipole are usually negligibly small, which allows for the light-matter interaction to be accurately treated within the electric dipole approximation. In this work we show that in a specially designed meta-atom, a disc metadimer, the electric quadrupole and magnetic dipole can be the only excitable multipoles. This condition is achieved in a narrow but tunable spectral range of visible light both for individual metadimers and for a periodic array of such particles. The electromagnetic fields scattered by the metadimers fundamentally differ from those created by electric dipoles. A metamaterial composed of such metadimers will therefore exhibit unusual optical properties.


Original languageEnglish
Article number035419
Pages (from-to)1-4
Number of pages4
JournalPhysical Review B
Issue number3
Publication statusPublished - 13 Jul 2012
MoE publication typeA1 Journal article-refereed

    Research areas

  • electric dipole-free interaction, metamaterials, plasmonics

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