Generation of spin currents by surface plasmon resonance

K. Uchida, Hiroto Adachi, D. Kikuchi, S. Ito, Z. Qiu, S. Maekawa, E. Saitoh

Research output: Contribution to journalArticle

30 Citations (Scopus)

Abstract

Surface plasmons, free-electron collective oscillations in metallic nanostructures, provide abundant routes to manipulate light-electron interactions that can localize light energy and alter electromagnetic field distributions at subwavelength scales. The research field of plasmonics thus integrates nano-photonics with electronics. In contrast, electronics is also entering a new era of spintronics, where spin currents play a central role in driving devices. However, plasmonics and spin-current physics have so far been developed independently. Here we report the generation of spin currents by surface plasmon resonance. Using Au nanoparticles embedded in Pt/BiY2Fe5O12 bilayer films, we show that, when the Au nanoparticles fulfill the surface-plasmon-resonance conditions, spin currents are generated across the Pt/BiY2Fe5O12 interface. This spin-current generation cannot be explained by conventional heating effects, requiring us to introduce nonequilibrium magnons excited by surface-plasmon-induced evanescent electromagnetic fields in BiY2Fe5O12. This plasmonic spin pumping integrates surface plasmons with spin-current physics, opening the door to plasmonic spintronics.

Original languageEnglish
Article number5910
JournalNature Communications
Volume6
DOIs
Publication statusPublished - Jan 8 2015

Fingerprint

Electromagnetic Fields
Surface Plasmon Resonance
Physics
Surface plasmon resonance
surface plasmon resonance
Nanoparticles
Magnetoelectronics
Plasmons
Electrons
Optics and Photonics
Light
Electromagnetic fields
Nanostructures
Electronic equipment
Heating
Equipment and Supplies
Photonics
plasmons
Research
electromagnetic fields

ASJC Scopus subject areas

  • Chemistry(all)
  • Biochemistry, Genetics and Molecular Biology(all)
  • Physics and Astronomy(all)

Cite this

Uchida, K., Adachi, H., Kikuchi, D., Ito, S., Qiu, Z., Maekawa, S., & Saitoh, E. (2015). Generation of spin currents by surface plasmon resonance. Nature Communications, 6, [5910]. https://doi.org/10.1038/ncomms6910

Generation of spin currents by surface plasmon resonance. / Uchida, K.; Adachi, Hiroto; Kikuchi, D.; Ito, S.; Qiu, Z.; Maekawa, S.; Saitoh, E.

In: Nature Communications, Vol. 6, 5910, 08.01.2015.

Research output: Contribution to journalArticle

Uchida, K, Adachi, H, Kikuchi, D, Ito, S, Qiu, Z, Maekawa, S & Saitoh, E 2015, 'Generation of spin currents by surface plasmon resonance', Nature Communications, vol. 6, 5910. https://doi.org/10.1038/ncomms6910
Uchida, K. ; Adachi, Hiroto ; Kikuchi, D. ; Ito, S. ; Qiu, Z. ; Maekawa, S. ; Saitoh, E. / Generation of spin currents by surface plasmon resonance. In: Nature Communications. 2015 ; Vol. 6.
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