CST – Computer Simulation Technology

Helical Plasmonic Nanostructures as Prototypical Chiral Near-Field Sources
Martin Schäferling, Xinghui Yin, Nader Engheta, Harald Giessen
ACS Photonics 2014
1, May 12, 2014
optical chirality, plasmonics, near-field response, numerical simulation, circular dichroism, chiroptical spectroscopy
Plasmonic nanostructures can generate electromagnetic fields with high optical chirality that interact strongly with chiral molecules. We demonstrate how structures with chiral eigenmodes lead to chiral near-fields of predominantly one handedness. Our theoretical design with multiple metallic helices exhibits very high optical chirality over a large volume. The expected averaged chiroptical interaction is almost 2 orders of magnitude higher than for circularly polarized light.

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