Chiral objects are not superimposable on their mirror image. This feature is ubiquituous in nature and for example chiral molecules posses the ability to affect the polarization of light - they are optically active. By tailoring complex structures on the nanoscale this effect can be mimicked in man-made metamaterials. In order to design such sophisticated devices, rigorous numerical simulation and modelling are required.


Metal nano helix and chirality density field

 

In this project, we analyze both theoretically and numerically the interaction of light and chiral matter. Electromagnetic fields are described with the recently introduced optical chirality density and accessible observables of e.g. extinction experiments are derived. Applications of these studies range from plasmonic sensing of chiral analytes to shaping the polarization properties of emitters employed in quantum communications.