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- W2030448178 endingPage "13179" @default.
- W2030448178 startingPage "13173" @default.
- W2030448178 abstract "Femtosecond nonlinear transmission techniques are applied to study mechanisms for optical nonlinearities and ultrafast carrier dynamics in CdS nanocrystals (NC's). The obtained data indicate the change in a dominant hole relaxation channel at high pump levels where nonlinear recombination effects start to play a significant role. This is manifested as a distinct difference in nonlinear-optical responses measured at low and high pump intensities in quasiequilibrium at long times after excitation. The analysis of the wavelength and time dependence of the nonlinear transmission over a wide pump-intensity range shows clearly that this difference is due to an Auger-process-assisted trapping of holes at surface/interface-related states. This trapping leads to efficient charge separation and the generation of a dc electric field that modifies the nonlinear optical response in NC's at high pump intensities." @default.
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- W2030448178 date "1997-05-15" @default.
- W2030448178 modified "2023-10-04" @default.
- W2030448178 title "Auger-process-induced charge separation in semiconductor nanocrystals" @default.
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- W2030448178 doi "https://doi.org/10.1103/physrevb.55.13173" @default.
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