Plasmon-Induced Magneto-Optical Activity in Nanosized Gold Disks
B. Sepúlveda, J. B. González-Dıaz, A. García-Martın, L. M. Lechuga and G. Armelles
Phys. Rev. Lett., 104, 2010, 147401/1-4 - DOI: 10.1103/PhysRevLett.104.147401
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.