Fig. 2

Exciton-phonon heat flow for laser-driven excitons. Predicted heat absorbed, Q/ħ, by a quantum-dot exciton transition, driven by a chirped laser pulse with a given spectral chirp, a, and pulse area, Θ₀. The panels correspond to different detunings between the exciton and the pulse centre frequency, δ = ω_x − ω(t = 0). a δ = 0. b δ = −2.5 ps⁻¹. c δ = 2.5 ps⁻¹. The units for the contour labels are ps⁻¹ and the contour spacing is 0.2 ps⁻¹