We studied confinement effects in CdTe quantum dots by means of photoluminescence excitation spectroscopy. We show that by changing the detection energy we can resolve the spectrum of quantum dots of different sizes inside their much broader size distribution in CdTe-doped glass. The spectra obtained show several well-resolved lines. There is excellent agreement between the photoluminescence excitation spectra peak energies and calculations of the confined energy transitions based on a modified multiband envelope function model.

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We have grown CdTe quvlem dots in glass, shldied the relaxation dynamics in the femtosecond time scale, and maured the non-linear refractive index in the infrared. Our observations. of very largenon-linear refractive index in the transparency region and femtosemnd recovery times of the resonant non-linearity, indicate that these materials are most promising for all+ptical photonic switching applications.