In collaboration with the CNR Nanotec group in Lecce, we have studied exciton-polariton condensation on a structure that leads to the formation of multiple condensates on the polariton dispersion in states of different topology. In particular, the condensates appear at a symmetry-protected (topological) bound-state in the continuum point, and at a (topologically trivial) finite momentum, where the density of states diverges and carriers can naturally accumulate.

We studied the coupling and competition between the condensates and the dynamical redistribution of the carriers in the dispersion. Interestingly, these condensates don’t appear at the same time, showing complex interactions between energy loss in the system and the topology of the bound-state in the continuum.

This research provides valuable insights into how we can engineer energy landscapes to precisely control polariton clustering, which is important for future technologies in light-based devices.

Read the article on arXiv.