Magneto-optics and Magnetoplasmonics in Nanomaterials

Magneto-optical techniques are useful characterization tools to investigate different types of nanoparticles. With respect to magnetometry, these techniques have an additional degree of freedom due to the tunability of the incoming light energy, providing access to additional information on the electronic structure of the materials. In addition, the use of magnetic fields to modulate plasmonic or excitonic resonances has also been demonstrated over the last 20 years, opening the application of magneto-optical spectroscopy to the analysis of semiconductor and plasmonic nanoparticles. In this chapter, the main results achieved so far in the field of magneto-optics and magnetoplasmonics are summarized, with a special focus on nanomaterials, including magnetic oxides, pure and magnetically doped semiconductor nanoparticles and plasmonic and magnetoplasmonic nanostructures. Some of the more recent trends and opportunities in the thriving fields of magneto-optics and magnetoplasmonics are also presented.