Magneto-refractive Second Harmonic Generation from Plasmonic Antennas in the Mid-infrared
The discovery of magnetic field-induced changes of the electric conductivity in metallic multilayers is highly appreciated in modern science in technology, including the Nobel prize of 2007. A few years ago, it was found that the infrared optical properties of these multilayers exhibit (rather small) similar magnetic sensitivity too.
In recent work published in Optics Letters, researchers found a much stronger nonlinear-optical effect. Employing powerful FELIX radiation in the mid-infrared range, they found 20% modulation of the second harmonic output upon the application of a small dc magnetic field. Residing at the intersection of spintronics and nonlinear optics, these results vehemently espouse the importance of interdisciplinary research in modern condensed matter physics.
Magneto-refractive Second Harmonic Generation from Plasmonic Antennas in the Mid-infrared, Ilya Razdolski, Gaspar Armelles, Alfonso Cebollada and Andrei Kirilyuk, Optics Letters 45, 4296-4299 (2020)