Continuous-wave two beam coupling in InP:Fe and GaAs : evidence for thermal hole-electron competition in InP:Fe

Philippe Delaye (1) , P.U. Halter (1) , Gérald Roosen (1)

1 Laboratoire Charles Fabry de l'Institut d'Optique / Manolia

We show that even if there is no direct hole-electron competition in InP: Fe the gain is lower than expected. We attribute this reduction of the gain to a thermally induced hole-electron competition that involves the excited state of Fe2+ (5T2). We present a new model for the photorefractive effect in InP: Fe, which we use to interpret our beam-coupling results. Some material parameters of the InP: Fe sample and particularly of the excited state are deduced. The same energy-transfer measurements conducted in GaAs give us the ratio of hole and electron photoionization cross sections.

Domaines: Optique [physics.optics]

Philippe Delaye, P.U. Halter, Gérald Roosen. Continuous-wave two beam coupling in InP:Fe and GaAs : evidence for thermal hole-electron competition in InP:Fe. Journal of the Optical Society of America B, 1990, 7 (12), pp.2268-2273. ⟨hal-00673572⟩