  We experimentally investigated for the first time the lowest four band
structure of Cd Se nanoplatelets at the r point of Brillouin zone [heavy-hole
(hh), light-hole (lh) and two spin-orbital bands] and its modification due to
the changing of the CdS shell thickness. The results of an experimental and
theoretical study of exciton dynamics in colloidal CdSe/CdS nanoplateles are
presented in the case of stationary laser excitation. The excitation was
performed by means of the powerful nanosecond laser and the pump and probe
technique was utilized. The differential transmission spectra peculiarities
