Toward Enhancing Chiro‐Optical and Magneto‐Optical Properties of Magnetic Nanocrystals by Surface Plasmons

Abstract Magneto‐optics, a research area that studies the interaction between magnetic fields and light, has recently made remarkable progress due to a better understanding of light–matter interactions at the nanoscale. The integration of magnetic and plasmonic functionalities with nanometric resolution offers exciting opportunities, especially due to the ability of plasmonic phenomena to enhance magneto‐optical responses. In this respect, wet‐chemistry methods are particularly useful in fine‐tuning the magnetic and plasmonic properties of nanocrystals, enabling the creation of a large library of hybrid colloidal systems with enhanced magneto‐optical features. Here, recent advancements in these magnetoplasmonic hybrid nanomaterials are explored and special focus on a key area of interest, that is, the nascent field of chiral plasmonics is put. Metal nanocrystals with intrinsic chiroptical features can lead to a combination of chiral plasmonics and magneto‐optics effects when interacting with the magnetic counterpart, paving the way toward the establishment of a systematic and comprehensive roadmap for the predesign and fabrication of chiral magnetoplasmonic systems. The implications of this progress are profound, offering both fundamental insights and promising technological applications.