Abstract:
Nonlinear optical properties of CuS and oxidised CuS (R = 5 nm) nanocrystals were investigated by the method of picosecond absorption spectroscopy. Oxidation of nanocrystals gave rise to an absorption band in the region of 1.09 μm. This band was bleached by excitation with laser pulses of 15 ps duration. An energy level diagram was proposed for oxidised CuS nanocrystals.