Antoine Bard

Université Claude Bernard Lyon 1, France

Title: Hybridization of two organic materials with polaritonic metasurfaces

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Biography

Antoine Bard is a PhD student since October 2019 in the Materials and Nanostructures Group of the Institute of Light and Matter of Lyon (France). The group develops research devoted to strong light-matter coupling in hybrid metal/semiconductor structures. Antoine Bard trained in physics and chemistry before specializing in condensed matter and optics during his master's degree. During his first year of PhD, he worked on multi-stacked J-aggregated dyes to characterize energy transfer before working on structured metasurfaces for the same purpose. He has also worked on core-shell nanoparticles for applications in catalysis chemistry. He is involved in the doctoral association and the institute council.

Abstract

The strong light matter coupling occurring when the light matter interaction overcome the damping, has found recently applications beyond the domain of optics, in chemistry or transport. These advances make crucial the development of various structures in strong coupling. In this talk we describe a new way to hybridize two materials and transfer energy through a surface plasmon over micrometric distances. Two patterned interlocked dyes arrays, one donor and one acceptor, are deposited on a silver surface by successive micro contact printing, leading to a pattern of 5 microns’ period. The dispersion relation of the structure is measured with reflectometry experiments and evidence the hybridization with the plasmon, and the formation of states mixing both excitons and the plasmon with similar weights. The mixing in these polaritonic metasurfaces enables an energy transfer mechanism in strong coupling, which is observed with luminescence experiments. As the donor and acceptor are spatially separated by a distance larger than the diffraction limit, the excitation transfer is directly measured and evaluated by comparison with dyes arrays without silver. The transfer from one material to the other in strong coupling could find applications in the excitation of organic devices with an efficient transfer and an easy access to the in-plane separated structures. Multimaterial polaritonic metasurfaces can also be extended to the vibrational strong coupling where the control of the energy states could find applications in strong coupling chemistry.