Figure 2. Calculated homogeneous broadening and coherence lifetime.

Predicted absorption spectrum of (a) WS₂ and (b) MoSe₂ for the energetically lowest resonance of the A exciton. All spectra were normalized to have the same peak value. While the blue line only includes the radiative linewidth, the other lines also contain non-radiative contributions due to exciton–phonon scattering at different temperatures. The magnitude of the microscopic polarization for (c) WS₂ and (d) MoSe₂ following excitation by a 10 fs pulse at t=0 (filled curve).