Evidence of localized surface plasmon enhanced magneto-optical effect in nanodisk array

Guan Xiang Du, Tetsuji Mori, Michiaki Suzuki, Shin Saito, Hiroaki Fukuda, Migaku Takahashi

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53 Citations (Scopus)

Abstract

Nanodisk array with sandwich structure of Au/[Co/Pt]n/Au was fabricated by electron beam lithography combined with argon ion milling. Excitation of localized surface plasmon resonance (LSPR) was demonstrated for various disk diameters. Magneto-optical (MO) properties were measured by a home-made micro-Faraday system at wavelengths of 633 and 690 nm. Faraday ellipticity at 690 nm showed non-monotonic dependence on disk diameter and reached maximum for disk diameter of 84 nm, which was associated with LSPR at 690 nm. The experimental results show direct evidence for LSPR enhancement effect on MO properties. The optical and MO properties were fitted by average field approximation.

Original languageEnglish
Article number081915
JournalApplied Physics Letters
Volume96
Issue number8
DOIs
Publication statusPublished - 2010 Mar 12

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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