Femtosecond white light spectroscopy on symmetrically strained (GaIn)As/Ga(PAs) multiple quantum wells

Summary form only given. We have performed femtosecond pump and probe experiments using a white light continuum on a series of symmetrically strained InGaAs-GaAsP multiple quantum well (MQW) samples. By changing the In-concentration, the compressive strain in the (GaIn)As layers and thus the energetic splitting between light-hole (Ih) and heavy-hole (hh) states can be varied.