A: semiconductors 1 Coherent spectroscopies 1 Delay Time 1 Dynamics 1 Excited states 1 Excitons 1 Four wave mixing 1 Four-wave-mixing 1 Gallium alloys 1 Gallium arsenide 1 III-V semiconductors 1 InGaAs quantum wells Indium alloys 1 Interaction features 1 Mutual interaction 1 Nonlinear contributions 1 Population dynamics 1 Semiconducting indium gallium arsenide 1 Semiconductor alloys 1 Semiconductor microcavities 1 Semiconductor quantum wells 1 Time dynamic 1