Evripidis Michail

Abstract Hybrid light–matter molecular exciton–polariton states have been proposed as a strategy to directly modify the efficiency and rate of photoinduced molecular charge transfer reactions. However, the efficacy of polariton-driven photochemistry remains an open question owing to the experimental challenges to tease out this effect. Here we demonstrate conditions under which photoinduced polaritonic charge transfer can be achieved and visualized using momentum-resolved ultrafast spectroscopy.

The dynamics of strongly coupled polariton systems integrated with two-dimensional transition metal dichalcogenides (TMDs) is key to enabling efficient coherent processes and achieving high-performance TMD-based polaritonic devices such as ultralow-threshold polariton lasers and ultrafast optical switches. However, there has been a lack of a comprehensive understanding of the excited state dynamics in TMD-based polariton systems.