Speaker
Description
Strong light-matter coupling offers a route to tunable and enhanced energy transport in organic materials via exciton-polaritons. These quasiparticles enable long-range ballistic flow, as observed in recent ultrafast microscopy experiments. However, experimental transport regimes vary from ballistic to diffusive, and the governing material properties remain unclear.
I will present full-quantum dynamical simulations of polariton transport in disordered organic media using the Multilayer multiconfiguration time-dependent Hartree (ML-MCTDH) method. I will discuss how vibronic interactions and static disorder influence transport. By analyzing wavepacket evolution in position and momentum space, we gain mechanistic insight into the ballistic-to-diffusive transition. Importantly, we can disentangle static and dynamic disorder, showing that static disorder primarily drives the onset of diffusion. This framework further allows us to examine the interplay between vibronic coupling and thermal disorder in shaping overall transport efficiency.