Séminaire LCT | Vladimiro Mujica "Nano-plasmonics and field-mediated chirality information transfer"

Le LCT vous convie à un séminaire présenté par

Vladimiro Mujica (School of Molecular Sicences, Arizona State University, USA)
 
intitulé
"Nano-Plasmonics and Field-Mediated Chirality Information Transfer"

Chirality transfer is a well-known phenomenon in molecular structures and interfaces, where chirality is inherited in supramolecular structures from chiral motives that intervene in the overall structure or interface. Less known is the fact that a chiral-like Raman response can be observed in an otherwise achiral molecule adsorbed on a plasmonic nanoparticle, due to the interaction of an electromagnetic field with a chiral molecule adsorbed on the same nanoparticle, and located tens of nanometers apart, hence preventing direct chemical interactions from being responsible of this phenomenon. The underlying physical mechanism is related to chirality-induced space inversion symmetry breaking, which couples the electric and magnetic molecular susceptibilities. The outgoing propagating field carries information about the molecular chirality in its circularly polarized components, which become different in magnitude due to the interaction with the chiral molecule. In this contribution, we will explore the potential applications of this phenomenon to control and enhance the chiral response of plasmonic nanoparticles.

Venez nombreux