Abstract

In the resonant regime, the optical Kerr effect of CdSe-doped glasses is due to photoexcitation of carriers whose presence modifies the optical properties of the CdSe quantum dots. The recovery time which governs the repetition rate at which such devices could be operated is equal to the recombination time of these carriers. At low laser intensity, the recombination time may be shortened by the photodarkening effect.¹ At higher density, nonlinear processes such as Auger recombination may play a significant role as already suggested² although it was pointed out³ that the first data could not clearly make the difference between a cubic (Auger) process or a quadratic one.

© 1994 Optical Society of America