Abstract

Quantum-size crystallites of Zn_0.95Cd_0.05S in an aqueous colloidal solution were optically excited using intense subpicosecond laser pump pulses tuned to the exciton band. Optical probing in the UV registered saturation and the kinetics of ground-state recovery due to carrier recombination, with lifetimes in the 0.8–30-psec range. Optical probing at 616 nm monitored the yield of Auger electron emission. The saturation and yield curves, as a function of pump fluence, are described by a simple kinetic model that involves the exciton lifetime before trapping (~30 fsec) and the maximum number of electrons (~16) that can be emitted per particle.

© 1990 Optical Society of America

Intensity-dependent absorption and luminescence in semiconductor-doped glasses

Martin Kull and Jean-Louis Coutaz
J. Opt. Soc. Am. B 7(8) 1463-1472 (1990)

Nonlinear optical properties of quantum-confined CdSe microcrystallites

S. H. Park, R. A. Morgan, Y. Z. Hu, M. Lindberg, S. W. Koch, and N. Peyghambarian
J. Opt. Soc. Am. B 7(10) 2097-2105 (1990)

Optical nonlinearity, bistability, and signal processing in semiconductors

N. Peyghambarian and H. M. Gibbs
J. Opt. Soc. Am. B 2(7) 1215-1227 (1985)

Relaxation dynamics of photoexcitations in polydiacetylenes and polythiophene

Takayoshi Kobayashi, Masayuki Yoshizawa, Uwe Stamm, Makoto Taiji, and Masamitsu Hasegawa
J. Opt. Soc. Am. B 7(8) 1558-1578 (1990)

Laser-induced irreversible change of the carrier-recombination process in CdSXSe_1–X-doped glasses

Makoto Tomita and Masahiro Matsuoka
J. Opt. Soc. Am. B 7(7) 1198-1203 (1990)