Using pulsed laser beam and electron beam coevaporation method, we have embedded CdTe microcrystallites into CaF_2 thin film in a highly based vacuum chamber. Nanometer scale CdTe particles are observed in the thin film with transmission electron micrographs. The blue shifts of the absorption bands and the corresponding shifts of photoluminescence bands are obtained. And the broadened optical phonon Raman structure and low wave number acoustic phonon structure are also obtained. These results are considered to be size effect of the CdTe microcrystallites
