Control of Intermolecular Electronic Excitation Energy Transfer: Application of Metal Nanoparticle Plasmons

Control of intermolecular electronic excitation energy transfer via metal nanoparticles is analyzed. Different control scenarios are presented which all utilize the effect of field-enhancement close to an optically excited metal nanoparticle. Due to this field-enhancement that part of a molecular chain or a molecular cluster gets excited which is in close proximity to the nanoparticle. Various simulation results are discussed related to the energy transfer kinetics in a uniform chain of 50 molecules in the vicinity of a single or two spherical gold nanoparticles. Interesting changes of the energy transfer pathways are found if the spatial and energetic arrangement between the molecular chain and the nanoparticles is altered

Theoretical Study of Strong Coupling between Molecular Shells and Chiral Plasmons of Gold Nanoparticles Helices

Chiral plasmonic nanostructures can produce strong chiral optical responses and have potential applications in photonics. Experimentally, metallic nanoparticle helices have been synthesized to achieve strong chiral responses. Strong coupling effects between the quantum emitters and the plasmon have attracted significant attention in the past decade and have been recently extended to the chiral plasmon of nanostructures. However, the strong coupling between molecules and metallic nanosphere helices has not been reported yet. In this article we study theoretically such an effect and examine the modulation of chiral and coupling effects by illumination light and molecular layer thickness. Our study may guide further experimental studies