Unveiling magnetic and chiral nanoscale properties using structured light and nanoantennas

Microscopy enables an unprecedented methodology to interrogate matter characteristics which revolutionizes the development of modern science. However, not all information about matters can be obtained by simply seeing their shape and dimensions. Consequently complex light-matter interaction is often required to reveal the hidden perspectives of light. Among the many unseen optical properties of matters, magnetism and chirality are typically weak and therefore difficult to detect especially with nanoscale resolution. Here we propose a photoinduced magnetic and chiral force microscopy system to unveil these hidden perspectives of light by measuring the respective photoinduced forces. First, we design, fabricate and indirectly characterize nano-structures as magnetic nanoprobe under incident azimuthally polarized beam (APB). Then, we explore possibilities of probe-sample interaction at nanoscale using a two-particle model to study the distinguished force between the particles induced by either chiral particle or chiral light.