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Structured light to reveal nanoscale magnetism and chirality

We explore possibilities to enhance magnetic-magnetic and magnetic-electric interactions between light and matter at nanoscale. We conceive magnetic nanoantennas to enhance magnetic local fields and hence enable the possibility to directly interact with magnetic dipolar transitions in matter. We also take advantage of certain structured beams because of their strong longitudinal magnetic field at their beam axes. This leads to the conception of a new microscopy technique based on photo-induced force related to magnetism and also to chirality of particles at nanoscale. Photo-induced magnetism and chirality at nanoscale are phenomena that are notoriously hard if not impossible to detect at nanoscale without the advent of nanoantennas and metamaterials.