Nonlinear absorption spectra for intersubband transitions of CdSe/ZnS spherical quantum dots

The electronic structure and optical properties of a one-electron quantum dot (QD) were investigated by assuming a spherically symmetric confining potential of finite depth. In this particular case CdSe is surrounded by ZnS. The energy eigenvalues and wave functions dependence on QD dimension were c...

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Bibliographic Details
Published in:Journal of nanophotonics 2011-01, Vol.5 (1), p.051810-051810
Main Authors: Kostic, Radmila, Stojanovic, Dusanka
Format: Article
Language:English
Subjects:
Cadmium selenides
Intermetallics
Mathematical analysis
Nanostructure
Nonlinearity
Oscillator strengths
Quantum dots
Zinc sulfides
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Summary:The electronic structure and optical properties of a one-electron quantum dot (QD) were investigated by assuming a spherically symmetric confining potential of finite depth. In this particular case CdSe is surrounded by ZnS. The energy eigenvalues and wave functions dependence on QD dimension were calculated by using effective mass approximation. We also calculated energies of , , and states, oscillator strengths, and the linear and third-order nonlinear intersubband optical absorption coefficients as a function of the QD dimension, incident photon energy, and incident optical intensity for the 1 -1 , 1 -1 , and 1 -2 transitions. Even in a simple composition, QD correct calculation of oscillator strength differs from the simplified approach in the most sensitive QD radius region below one Bohr radius.
ISSN:1934-2608
1934-2608
DOI:10.1117/1.3599444