Figure 3.
Momentum-resolved exciton dynamics. Momentum- and energy-resolved snapshots of exciton occupations for the most relevant 1 s, 1s-KΛ, 2p, 2 s, 3 s, 4 s and 5 s states for three characteristic times. The Λ-valley has been shifted in momentum for a better presentation. (a) Polarisation-to-population transfer during the pump pulse at t = 250 fs. (b) Intermediate exciton distribution at t = 400 fs. (c) Nearly relaxed Boltzmann-like exciton occupation at t = 2 ps.