Effects of pumping on propagation velocities of confined exciton polaritons in GaAs/AlxGa1−xAs double heterostructure thin films under resonant and non-resonant probe conditions

Abstract

Effects of pumping on propagation velocities of confined exciton polaritons in GaAs/AlxGa1−xAs double heterostructure thin films under resonant and non-resonant probe conditions

Pulse modulation towards low-power operation based on the quantum beat of excitons in a GaAs/AlAs multiple quantum well

“…Since the intensity of the second harmonic light due to the spatial and temporal overlap between probe pulse reflected from the sample and the gate pulse was recorded as the cross-correlation signal, the signal demonstrates the temporal shape of the probe pulse. The setup was described in detail in our previous report [26]. Figure 1 shows the time-resolved reflection-type pump-probe signals observed by different pump powers.…”