8 ITMP3 / 8éme conférence internationale de photoacoustique et photothermique
J. Phys. IV France 04 (1994) C7-151-C7-154
Special effects of 3D diffusion of plasma waves : non linear photoreflectance signalB.C. Forget1, D. Fournier1 and V.E. Gusev2
1 Laboratoire d'Instrumentation, Université Pierre et Marie Curie, ESPCI, 10 rue Vauquelin, 75005 Paris, France
2 International Laser Center, Moscow State University, 119899 Moscow, Russia
Increasing the photon flux of the pump beam can lead to non linearities in the photoreflectance signal of semiconductor samples. We will show that it is more difficult to obtain the non-linear regime in the case of three dimensional diffusion than in the monodimensional case. This observation adds credit to our model which assumes that non-linear effects observed are due to Auger recombination.
© EDP Sciences 1994