Optomagnets in nonmagnetic plasmonic nanostructures

Abstract

Using a hydrodynamic model of the free electron gas of metal, we theoretically investigate optically-induced DC current loops in a plasmonic nanostructure. Such current loops originate from an optical rectification process relying on three electromotive forces, one of which arises from an optical spin-orbit interaction. The resulting static magnetic field is found to be maximum and dramatically confined at the corners of the plasmonic nanostructure, which reveals the ability of metallic discontinuities to concentrate and tailor static magnetic fields on the nanoscale.

References in corpus (9)

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Cited by in corpus (3)

• Inverse-Faraday effect from the orbital angular momentum of light
• Plasmon-enhanced optical control of magnetism at the nanoscale via the inverse Faraday effect
• Active tuning of plasmon damping via light induced magnetism