Effects of nanoparticles size and concentration and laser power on nonlinear optical properties of Au and Au–CdSe nanocrystals,
Salah, Abeer, Mansour A., Mohamed M. B., Azzouz I. M., Elnaby S., and Badr Y.
, Applied Surface Science, Volume 353, p.112 - 117, (2015)
AbstractAbstract Au and Au–CdSe nanoparticles (NPs) have been synthesized by organometallic pyrolysis method. Nano-crystals (NCs) structure was confirmed using high resolution transmission electron microscope (HRTEM) and X-ray diffraction (XRD). Nonlinear optical absorption is investigated by Z-scan technique using nanosecond laser pulses of second harmonic Nd:YAG. Intensity-dependence of nonlinear absorption on both nano-size and concentrations is reported. These are interesting findings which can be used to fabricate optical limiting and optical switching devices from \{NPs\} and hybrid systems.
Effects of nanoparticles size and concentration and laser power on nonlinear optical properties of Au and Au–CdSe nanocrystals,
Salah, Abeer, Mansour A., Mohamed M. B., Azzouz I. M., Elnaby S., and Badr Y.
, Applied Surface Science, Volume 353, p.112 - 117, (2015)
AbstractAbstract Au and Au–CdSe nanoparticles (NPs) have been synthesized by organometallic pyrolysis method. Nano-crystals (NCs) structure was confirmed using high resolution transmission electron microscope (HRTEM) and X-ray diffraction (XRD). Nonlinear optical absorption is investigated by Z-scan technique using nanosecond laser pulses of second harmonic Nd:YAG. Intensity-dependence of nonlinear absorption on both nano-size and concentrations is reported. These are interesting findings which can be used to fabricate optical limiting and optical switching devices from \{NPs\} and hybrid systems.
Spectroscopic laser parameters of Ag/CdTe nanostructure,
Giba, A. E., Gadallah A. - S., Mohamed M. B., and Azzouz I. M.
, Journal of Luminescence, Volume 167, p.408 - 412, (2015)
AbstractAbstract We report spectroscopic laser parameters analysis for CdTe quantum dots (QDs) in the presence of Ag nanoparticles (NPs). Absorption and emission cross-sections of about 2 nm-particle size of aqueous CdTe \{QDs\} were estimated, when different contents of about 40 nm Ag nanoparticles were added. The fluorescence, radiative lifetimes and the energy transfer between Ag \{NPs\} and CdTe \{QDs\} have been investigated. Lasing parameters that evaluate the possibility of getting laser action for these nanomaterials were calculated. The energy transfer mechanism between Ag \{NPs\} and CdTe \{QDs\} was occurred by Forster resonance energy transfer (FRET) as the average distance between them is about 50 nm.
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