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Phys Rev Lett. 2010 Apr 9;104(14):147401. Epub 2010 Apr 7.

Plasmon-induced magneto-optical activity in nanosized gold disks.

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  • 1Research Center on Nanoscience and Nanotechnology-CIN2 (CSIC) and CIBER-BBN, 08196 Bellaterra, Spain.

Abstract

In this Letter we show that nanostructures made out of pure noble metals can exhibit measurable magneto-optic activity at low magnetic fields. This phenomenon occurs when the localized surface plasmon resonance of the nanostructure is excited in the presence of a static magnetic field parallel to the propagation of incident light. The large magneto-optical response observed comes from an increase of the magnetic Lorentz force induced by the large collective movement of the conduction electrons in the nanostructures when the resonance is excited.

PMID:
20481960
[PubMed]
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