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[17a-303-4] Deplete excitation ? of defects states in TiO2 nano particles
observed using PEEM and fs laser
Keywords:TiO2, defects state, PEEM
TiO2 on si wafer was observed by PEEM with pump-and-probe. When fundamental wavelength laser and second harmonic laser are irradiated at the same time, particle brightness was enhanced. The enhancement decreased when fundamental laser power was increased. This ca be explained by deppletion of defects states which supply electrons.