Nonlinear optical absorption of glassy thin films containing InSb nanocrystals was measured by Z-scan technique using Gaussian beam of He-Ne laser(632.8 nm).Both two-photon and saturation absorptions were observed in ...Nonlinear optical absorption of glassy thin films containing InSb nanocrystals was measured by Z-scan technique using Gaussian beam of He-Ne laser(632.8 nm).Both two-photon and saturation absorptions were observed in the composite thin films containing InSb nanocrystals with different average sizes.An enhanced nonlinear optical coefficient was achieved.展开更多
Semiconductor InSb microcrystallites were embedded in SiO_(2) thin films by rf cosputtering technique.Structures of the thin films were characterized by transmission electron microscopy,x-ray diffraction,and x-ray pho...Semiconductor InSb microcrystallites were embedded in SiO_(2) thin films by rf cosputtering technique.Structures of the thin films were characterized by transmission electron microscopy,x-ray diffraction,and x-ray photoelectron spectroscopy.Average size of the microcrystallites,depending on post-annealing temperature and time,is on the order of magnitude of nanometer.Absorption spectra of the films were measured and large blue shifts of absorption edge were observed in a wide range from 300 to 1500nm.The blue shifts were attributed to the quantum confinement effect and explained in the model of effective-mass approximation.展开更多
文摘Nonlinear optical absorption of glassy thin films containing InSb nanocrystals was measured by Z-scan technique using Gaussian beam of He-Ne laser(632.8 nm).Both two-photon and saturation absorptions were observed in the composite thin films containing InSb nanocrystals with different average sizes.An enhanced nonlinear optical coefficient was achieved.
文摘Semiconductor InSb microcrystallites were embedded in SiO_(2) thin films by rf cosputtering technique.Structures of the thin films were characterized by transmission electron microscopy,x-ray diffraction,and x-ray photoelectron spectroscopy.Average size of the microcrystallites,depending on post-annealing temperature and time,is on the order of magnitude of nanometer.Absorption spectra of the films were measured and large blue shifts of absorption edge were observed in a wide range from 300 to 1500nm.The blue shifts were attributed to the quantum confinement effect and explained in the model of effective-mass approximation.
