Polariton-assisted long-distance energy transfer between excitons in two-dimensional semiconductors

Polaritons formed by strong exciton-photon coupling can drastically increase the distance of coherent energy exchange between excitonic materials, but poor durability or low operational temperature in previously demonstrated materials has limited the range of possible applications. Here, the authors demonstrate two-dimensional transition metal dichalcogenide semiconductors placed in a tunable optical microcavity as a durable, room-temperature platform for polariton-mediated energy transfer between excitons. The full quantum mechanical simulations based on experimental parameters reveal efficient energy transfer over 1 {μ}m distance on a femtosecond timescale.