Paul et al: Time-resolved measurements of the polarization state of four-wave mixing signals from GaAs multiple quantum wells

Four-wave mixing signals from extended e

Four-wave mixing signals from extended exciton states above the mobility edge in GaAs/(Ga,Al)As multiple quantum wells

✍ G. Bongiovanni; A. Mura; J.L. Staehli 📂 Article 📅 1994 🏛 Elsevier Science 🌐 English ⚖ 210 KB

We investigate the dependence of four-wave mixing response on the photon energy close to the fundamental exciton (X) resonance in GaAs quantum wells. We find that crosspolarised incident fields give rise to a non-linear signal which decays faster at energies below the \(\mathrm{X}\) line centre than