Abstract
We investigate the chiral properties of near fields around plasmonic nanostructures and their relation to the electromagnetic chirality . By combining chiral metal nanoparticles with achiral dye molecules and measuring the circular polarization dependence of the enhanced photoluminescence, we find a correlation between the dissymmetry of the luminescence enhancement and the calculated values of . These effects are strong (), despite the weak circular dichroism of the particles (). We further show that represents the chiral selectivity of the near-field coupling between an emitter and a nanoantenna.
- Received 18 January 2013
DOI:https://doi.org/10.1103/PhysRevB.88.041407
©2013 American Physical Society