Affiliation:
1. Sorbonne Université, CNRS, Institut des NanoSciences de Paris, INSP , F-75005 Paris , France
Abstract
Abstract
The inverse Faraday effect (IFE) generates magnetic fields by optical excitation only. Since its discovery in the 60 s, it was believed that only circular polarizations could magnetize matter by this magneto-optical phenomenon. Here, we demonstrate the generation of an IFE via a linear polarization of light. This new physical concept results from the local manipulation of light by a plasmonic nano-antenna. We demonstrate that a gold nanorod excited by a linear polarization generates non-zero magnetic fields by IFE when the incident polarization of the light is not parallel to the long axis of the rod. We show that this dissymmetry generates hot spots of local non-vanishing spin densities (local elliptical polarization state), introducing the concept of super circular light, allowing this magnetization. Moreover, by varying the angle of the incident linear polarization with respect to the nano-antenna, we demonstrate the on-demand flipping of the magnetic field orientation. Finally, this linear IFE generates a magnetic field 25 times stronger than a gold nanoparticle via a classical IFE. Because of its all-optical character, this light–matter interaction opens the way to ultrafast nanomanipulation of magnetic processes such as domain reversal, skyrmions, circular dichroism, control of the spin, its currents, and waves, among others.
Subject
Electrical and Electronic Engineering,Atomic and Molecular Physics, and Optics,Electronic, Optical and Magnetic Materials,Biotechnology
Reference49 articles.
1. L. Pitaevskii, “Electric forces in a transparent dispersive medium,” Sov. Phys. JETP, vol. 12, pp. 1008–1013, 1961.
2. J. Van der Ziel, P. S. Pershan, and L. Malmstrom, “Optically-induced magnetization resulting from the inverse Faraday effect,” Phys. Rev. Lett., vol. 15, p. 190, 1965. https://doi.org/10.1103/physrevlett.15.190.
3. P. Pershan, J. Van der Ziel, and L. Malmstrom, “Theoretical discussion of the inverse Faraday effect, Raman scattering, and related phenomena,” Phys. Rev., vol. 143, p. 574, 1966. https://doi.org/10.1103/physrev.143.574.
4. J. Deschamps, M. Fitaire, and M. Lagoutte, “Inverse Faraday effect in a plasma,” Phys. Rev. Lett., vol. 25, p. 1330, 1970. https://doi.org/10.1103/physrevlett.25.1330.
5. V. Tsytovich, “Magnetic-field generation in collisionless plasmas,” Comments Plasma Phys. Contr. Fusion, vol. 4, pp. 81–89, 1978.
Cited by
12 articles.
订阅此论文施引文献
订阅此论文施引文献，注册后可以免费订阅5篇论文的施引文献，订阅后可以查看论文全部施引文献