Tag: Quantum dots

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Studies on Transient Processes under Excitation of Ultrashort Laser Pulses in Colloidal Solutions of CdSe/ZnS Quantum Dots

We previously concluded that RSA (reverse saturable absorption) is the key mechanism of optical limiting in CdSe/ZnS QDs by nanosecond pulses working simultaneously with “light quenching.” The limiting kinetics and OL mechanisms are significantly altered when the pulse duration is reduced [1,2,3]. In the event of ps-pulses and bright light, free carriers absorption became considerable.…
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December 2, 2021 0

Diamagnetic Susceptibility of a Magneto-Donor in GaAs Spherical and Cylindrical Quantum Dot

The type effect is theoretically studied in the presence of a magnetic field on the binding energy and diamagnetic resistance of a shallow donor restricted to moving in Quantum Dots’QD ‘. Magnetic field effects are predominant for higher field intensity and large dots. The numerical calculations, using a variational method, are carried out in the…
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February 24, 2021 0