Gigantic plasmon resonance effects on magneto-optical activity of molecularly thin ferromagnets near gold surfaces

Minoru Osada, Natália Hajduková-Šmídová, Kosho Akatsuka, Satoshi Yoguchi, Takayoshi Sasaki

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

We report on a new magneto-plasmonic material consisting of 1 nm thick ferromagnetic nanosheets and Au nanoparticles. The magneto-optical (MO) Kerr spectra of Ti0.8Co0.2O2 nanosheets near Au surfaces showed a gigantic MO response (∼106 deg cm-1) in the visible wavelength region (380-600 nm), not present in Ti 0.8Co0.2O2 nanosheets on a bare glass substrate. The observed peaks correspond to intrinsic d-d* electronic transitions in Ti0.8Co0.2O2 and are consistent with the near-field enhancement of the MO response resulting from the spectral overlap of the surface-plasmon-resonance (SPR) in the Au surface with the electronic transitions in Ti0.8Co0.2O2. Similar SPR effects were also achieved in ferromagnetic nanosheet/Au with different compositions and with different separation distances (<5 nm). This demonstration of SPR-enhanced magneto-optics in the ferromagnetic/plasmonic nanosystem may enable designing of nanoarchitectures for miniaturized high-performance MO devices and for remote sensing and imaging of magnetic fields.

Original languageEnglish
Pages (from-to)2520-2524
Number of pages5
JournalJournal of Materials Chemistry C
Volume1
Issue number14
DOIs
Publication statusPublished - 2013 Apr 14
Externally publishedYes

Fingerprint

Nanosheets
Gold
Surface plasmon resonance
Magnetooptical devices
Nanosystems
Magnetooptical effects
Remote sensing
Demonstrations
Magnetic fields
Nanoparticles
Imaging techniques
Glass
Wavelength
Substrates
Chemical analysis

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Chemistry

Cite this

Gigantic plasmon resonance effects on magneto-optical activity of molecularly thin ferromagnets near gold surfaces. / Osada, Minoru; Hajduková-Šmídová, Natália; Akatsuka, Kosho; Yoguchi, Satoshi; Sasaki, Takayoshi.

In: Journal of Materials Chemistry C, Vol. 1, No. 14, 14.04.2013, p. 2520-2524.

Research output: Contribution to journalArticle

Osada, Minoru ; Hajduková-Šmídová, Natália ; Akatsuka, Kosho ; Yoguchi, Satoshi ; Sasaki, Takayoshi. / Gigantic plasmon resonance effects on magneto-optical activity of molecularly thin ferromagnets near gold surfaces. In: Journal of Materials Chemistry C. 2013 ; Vol. 1, No. 14. pp. 2520-2524.
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