Dynamics of dark and bright excitons

30. November 2020 - 17:16

By varying the time between the exciton-generating pump pulse and the extreme ultraviolet pulse that kicked out the electrons, the scientists were able to construct a video showing how dark excitons (red) and bright excitons (blue) changed over time.

Credit: 
Reprinted with permission from [Madéo et al.], Directly visualizing the momentum-forbidden dark excitons and their dynamics in atomically thin semiconductors AAAS Science 2020