(151f) Structure-Tunable Chiral Plasmonic Resonators By Electroless Deposition

The chiral light-matter interaction between molecular systems and circularly polarized light is often weak due to the scale mismatch between the molecular wavefunction and the wavelength of light. In the vicinity of a chiral plasmonic material, the local electric field can become particularly twisted, inducing near-field chiral effects such as plasmon-enhanced optical activity. Many techniques have been developed to transfer chirality to plasmonic structures such as the introduction of chiral ligands or self-assembly. However, the chirality induced is often small, or sensitive to the fragile arrangement of individual resonators. There is a need for new, intrinsically chiral, plasmonic structures. Here, we demonstrate a simple and scalable method for colloidal synthesis of chiral plasmonic nanostructures of high optical anisotropy by silica templating of chiral bowtie nanoassemblies, followed by electroless silver deposition. The result is chiral silver plasmonic resonators of tunable size and spectral resonance.