Figure 1

(a) Rabi oscillations of the photocurrent, at resonance, as a function of the excitation amplitude. The dotted line is the solution given by the Markovian Bloch equations with the dephasing rate independent of the driving field, whereas the solid line corresponds to the solution of the Bloch equations with the driving-dependent dephasing rate and generalized Rabi frequency given by Eqs. (10, 11). Solid squares represent experimental data from Zrenner et al. [2], for a pulse width of about 1 ps. Here, a $\pi$ pulse corresponds to the unit of the excitation amplitude. (b) ROs in the photoluminescence (PL) intensity, at resonance, with full theoretical curves corresponding in descending order to pulse widths of 9.3, 7.0, and 5.4 ps, respectively. Calculations are performed with the driving-dependent dephasing rate and generalized Rabi frequency as in (a). Solid symbols are the corresponding experimental data from Wang et al. [3].Reuse & Permissions

Figure 2

Examples of (a) dephasing rate $\kappa (t)$ [cf. Eq. (16)] and (b) upper-state population dynamics, for the fixed time moment corresponding to the end of the rectangular pulse, versus excitation amplitude, for a model [6] $⟨\mathbf{R}(t)⟩\sim \gamma \Omega e^{-\gamma (t-t_0)}$, with $\gamma =2{\mathrm{ps}}^{-1}$. Dotted lines correspond to $D_{++}(\tau -t)=1$ whereas solid lines correspond to the $D_{++}(\tau -t)$ defined in Eq. (7).Reuse & Permissions