Figure 4
From: Robust Population Inversion by Polarization Selective Pulsed Excitation
Ramsey interference experiments for co- and cross-polarized double pulse excitation with a total pulse area of π. (a) Co-polarized case as sketched in (b) and (c) Fine tuning of the phase leads to a full modulation of the occupancy, which is measured by photocurrent detection. (e) The phase-dependence of the occupancy virtually vanishes for cross-polarized excitation as sketched in (b) and (d).
