MEASUREMENT OF THE SIZE-DEPENDENT HOLE SPECTRUM IN CDSE QUANTUM DOTS

We combine a new synthesis with transient optical hole burning to obse rve and assign the size evolution (19 to 115 angstrom diameter, sigma < 5%) of a series of excited states in CdSe quantum dots. We observe a n avoided crossing around the spin orbit energy in the hole spectra fo r approximately 65 angstrom dots, indicating the importance of valence band complexities in the description of the excited states. Compariso n with dc Stark data shows that bleach spectra are consistent with loc alized carrier induced electric fields.