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Nano Lett. 2011 Mar 9;11(3):1237-40. doi: 10.1021/nl1042243. Epub 2011 Feb 14.

Plasmonics and enhanced magneto-optics in core-shell co-ag nanoparticles.

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  • 1Department of Physics, College of William & Mary , Williamsburg, Virginia 23187, United States.


We present theoretical and experimental studies that explain the observed strong enhancement of the magneto-optical (MO) Faraday rotation in all-metal core-shell Co-Ag nanoparticles (NPs) attributed to localized surface plasmon resonance (LSPR). We also explain why the optical absorption and MO spectra peaks appear blue-shifted with increased Co core size while keeping the NP size constant. Further, we demonstrate direct correlation between the strong LSPR induced electromagnetic fields and the enhanced MO activity of the NPs.

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