Figure 4.
(a) Number of events (in logarithmic scale) as a function of the detection threshold (in units of σ), for different pump currents. (b) Number of events in color code (logarithmic scale) vs. the pump current and the detection threshold. The white color indicates that no events are detected. (c) Number of events in color code (logarithmic scale) vs. the pump current for three detection thresholds. The arrow indicates the boundaries of the LFF region, where the depth of the intensity dropouts is regular and thus, the number of events is the same for the three thresholds.
