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Optics Express

Optics Express

  • Editor: Martijn de Sterke
  • Vol. 16, Iss. 20 — Sep. 29, 2008
  • pp: 16104–16112

Localized surface plasmon resonance effects on the magneto-optical activity of continuous Au/Co/Au trilayers

Gaspar Armelles, Juan Bautista González-Díaz, Antonio García-Martín, José Miguel García-Martín, Alfonso Cebollada, María Ujué González, Srdjan Acimovic, Jean Cesario, Romain Quidant, and Gonçal Badenes  »View Author Affiliations

Optics Express, Vol. 16, Issue 20, pp. 16104-16112 (2008)

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We study how the magneto-optical activity in polar configuration of continuous Au/Co/Au trilayers is affected by the excitation of localized plasmon resonances of an array of Au nanodiscs fabricated on top of them over a dielectric SiO2 spacer. We show that the effect of the nanodiscs array is twofold. First, it optimizes the absorption of light at specific photon energies corresponding to the localized surface plasmon excitation of the array, modifying the reflectivity of the system (we define this effect as the purely optical contribution). Second, upon localized plasmon resonance excitation, the electromagnetic field in the whole system is redistributed, and an enhanced magneto-optical activity occurs at those energies where the electromagnetic field in the magnetic layer is increased (this effect is identified as the purely magneto-optical contribution of the nanodiscs array).

© 2008 Optical Society of America

OCIS Codes
(160.3820) Materials : Magneto-optical materials
(230.3810) Optical devices : Magneto-optic systems
(240.6680) Optics at surfaces : Surface plasmons
(350.4238) Other areas of optics : Nanophotonics and photonic crystals
(250.5403) Optoelectronics : Plasmonics

ToC Category:
Optics at Surfaces

Original Manuscript: August 14, 2008
Revised Manuscript: September 15, 2008
Manuscript Accepted: September 16, 2008
Published: September 25, 2008

Gaspar Armelles, Juan Bautista González-Díaz, Antonio García-Martín, José Miguel García-Martín, Alfonso Cebollada, María Ujué González, Srdjan Acimovic, Jean Cesario, Romain Quidant, and Gonçal Badenes, "Localized surface plasmon resonance effects on the magneto-optical activity of continuous Au/Co/Au trilayers," Opt. Express 16, 16104-16112 (2008)

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