Special Section: Selected Papers from the 3rd Mediterranean Conference on Nanophotonics

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

[+] Author Affiliations
Radmila Kostić, Dušanka Stojanović

University of Belgrade, Institute of Physics, P. O. Box 68, 11080 Belgrade, Serbia

J. Nanophoton. 5(1), 051810 (June 10, 2011). doi:10.1117/1.3599444
History: Received February 01, 2011; Revised April 28, 2011; Accepted May 23, 2011; Published June 10, 2011; Online June 10, 2011
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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 s, p, and d 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 1s-1p, 1p-1d, and 1p-2s 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.

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© 2011 Society of Photo-Optical Instrumentation Engineers (SPIE)

Citation

Radmila Kostić and Dušanka Stojanović
"Nonlinear absorption spectra for intersubband transitions of CdSe/ZnS spherical quantum dots", J. Nanophoton. 5(1), 051810 (June 10, 2011). ; http://dx.doi.org/10.1117/1.3599444


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