Substrate-Induced Chirality in an Individual Nanostructure

• DOI: 10.1021/acsphotonics.9b00748
• Publication Date: 2019-07-18T20:23:00Z
• Authors: Sergey Nechayev; René Barczyk; Uwe Mick; Peter Banzer
• Keywords: Chirality; Optical Rotation

We experimentally investigate the chiral optical response of an individual nanostructure consisting three equally sized spherical nanoparticles made different materials and arranged in 90° bent geometry. Placing on a substrate converts its morphology from achiral to chiral. Chirality leads pronounced differential extinction (circular dichroism) rotation birefringence), which would be strictly forbidden absence or heterogeneity. This first experimental observation substrate-induced break symmetry heterogeneous sheds new light light–matter interactions at substrate–nanostructure interfaces.