Polaritons are hybrid states of photons and matter often created by putting a material inside of a cavity. We have made polariton cavities using semiconducting carbon nanotubes, which have very large transition dipoles, and thus couple strongly to the light field in the cavity. The strong light-matter coupling induces their excitons to become spatially delocalized in these cavities, which impacts the energy transfer dynamics. I will present results on these cavities using ultrafast transient absorption and 2D White-Light spectroscopy that have provided new insights into the relaxation mechanisms of polaritons and how energy transfers between nanotubes that are coupled to a common light field.

Energy transfer in polariton cavities of semiconducting carbon nanotubes using ultrafast 2D white-light spectroscopy

ACS Spring 2022

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