Polaritonic Recycling in Intermediate-Thickness Transition Metal Dichalcogenides
Presented by Paul Brown
Abstract:
Intermediate-thickness MoS2 exhibits self-hybridization with its own Fabry-Perot1 cavity modes, resulting in intrinsic exciton-polaritons. In the small-detuning regime of this self-hybridization, there is large spectral overlap between exciton-polariton states and the uncoupled reservoir of exciton states, leading to efficient population exchange between fast-propagating exciton-polariton states and long-lived diffusive uncoupled 2 exciton states. This exchange results in “polaritonic recycling,” or polariton-assisted long-range fast energy transport orders of magnitude faster than regular diffusive transport, and transport lengths of up to 4 μm from the excitation spot.
1. Munkhbat et al, ACS Photonics 2019, 6, 139-147.
2. Groenhof et al, J. Phys. Chem. Lett. 2019, 10, 18, 5476-5483.
