M. Ko et M. Birnboim, Large saturation absorption of CdSSeTe nanocrystallites in glass measured by femtosecond Z-scan technique, ADV MAT OPT, 9(6), 1999, pp. 219-226
The optical non-linearity of CdSSeTe nanocrystallite-doped glasses has been
studied using a single-beam, femtosecond Z-scan technique. We have observe
d very large absorption saturation in a composite of CdSSeTe nanocrystals i
n a glass host compared with CdS or CdSe, although we have not reached the
saturation limit. The wavelength and power dependence of absorption saturat
ion in these composites are reported. The experimental data are interpreted
by a two-level model system. A comparison is also made with other nanocrys
tallite composites with different stoichiometric compositions. Copyright (C
) 2000 John Wiley & Sons, Ltd.