Current control of light by nonreciprocal magnetoplasmonics

Yongkang Gong, Kang Li, Nigel Copner, Juan Martinez, Jungang Huang

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The ability to actively control light has long been a major scientific and technological goal. We proposed a scheme that allows for active control of light by utilizing the nonreciprocal magnetoplasmonic effect. As a proof of concept, we applied current signal through an ultrathin metallic film in a magneto-plasmonic multilayer and found that dynamic photonic nonreciprocity appears in magnetic-optical material layer due to the magnetic field being induced from current signal and modulates surface plasmon polaritons trapped in the metal surface and the light reflected. The proposed concept provides a possible way for the active control of light and could find potential applications such as ultrafast optoelectronic signal processing for plasmonic nanocircuit technology and ultrafast/large-aperture free-space electro-optic modulation platform for wireless laser communication technology.
Original languageEnglish
JournalApplied Physics Letters
Issue number19
Publication statusPublished - 1 May 2015


  • Magnetic fields
  • Gold
  • Magnetic materials
  • Cobalt
  • Plasmons


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