A new protocol from Gervasi Herranz and the MULFOX group at ICMAB shows how magnetic fields can change the propagation of light in confined nanostructured materials and reveal enhanced optical responses. This new protocol is published as a VIDEO-ARTICLE at the Journal of Visualized Experiments (JoVE). The new protocol allows to directly study how magnetization changes the photonic response.
Photonic band structure enables understanding how confined electromagnetic modes propagate within a photonic crystal. In photonic crystals that incorporate magnetic elements, such confined and resonant optical modes are accompanied by enhanced and modified magneto-optical activity. We describe a measurement procedure to extract the magneto-optical band structure by Fourier space microscopy.
A new protocol from Gervasi Herranz and the #MULFOXgroup at ICMAB, CSIC shows how magnetic fields can change the propagation of light in confined nanostructured materials and reveal enhanced optical responses.
This enables direct study of how magnetization changes photonic response! — JoVE (@JoVEJournal) November 27, 2019
This information enables us to build a complete map of the plasmonic band structure of the grating and the angle and wavelength dependent magneto-optical activity. These two images allow us to pinpoint the effect that the plasmon resonances have on the magneto-optical response of the grating. The relatively small magnitude of magneto-optical effects requires a careful treatment of the acquired optical signals. To this end, an image processing protocol for obtaining magneto-optical response from the acquired raw data is laid out.
Kataja, M., Cichelero, R., Herranz, G.
Spectral and Angle-Resolved Magneto-Optical Characterization of Photonic Nanostructures
J. Vis. Exp. (153), e60094