Light-Matter Interaction at the Nanoscale with Polarization-Tailored _Elds
October 23rd, 2017 PAWEL WOZNIAK Max Planck Institute for the Science of Light, Erlangen

In the interaction of light with nanoparticles, the structure of the incoming light _eld plays an important role and can result in the excitation of multipolar modes not excitable with a plane wave. Here, it is shown that polarization-tailored light beams can selectively excite individual mul- tipole resonances in a high refractive-index nanosphere and suppress excitation of other modes. For sub-wavelength particles, this approach of polarization-engineered excitation paves the way for the realization of di_erent applications based on, for instance, the controllable directional far-_eld emission of a single scatterer. Also in the light-matter interaction of chiral systems, polarization plays a crucial role. In this regard, spin of light is utilized to study the multipolar response of an individual chiral scatterer. Such description yields key insight into the origin of the optical activity and can provide novel design concepts for chirality at the nanoscale.

Seminar, October 23, 2017, 12:00. ICFO Seminar Room

Hosted by Niek van Hulst