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Fizika A : a journal of experimental and theoretical physics, Vol. 16 No. 1, 2007.

Original scientific paper

Exciton state in a quantum dot

S. A. Safwan ; Theoretical Physics Department, National Research Center Cairo, Egypt
M. H. Hekmat ; Theoretical Physics Department, National Research Center Cairo, Egypt
N. A. El-Meshad ; Theoretical Physics Department, National Research Center Cairo, Egypt

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Abstract

The exciton binding energies in finite-potential quantum dot discs of GaAs are obtained and the eigenstates and the eigenvalues of the exciton are calculated. We present the exciton binding energy for different values of the disc radius (R) and the disc half-width (L/2). The exciton-state stability for large and small sizes of the dot is discussed. We compare our results with the existing theoretical and experimental results. Our results give good estimates for the optimal quantum dot disc geometry, and represent useful data in studies of the optical properties of quantum dots in nano-scale devices.

Keywords

quantum dot disc; GaAs; finite potential; exciton binding energy; eigenstates; eigenvalues

Hrčak ID:

302183

URI

https://hrcak.srce.hr/302183

Publication date:

1.3.2007.

Article data in other languages: croatian

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