Intersubband optical absorption coefficients and refractive index changes in a parabolic cylinder quantum dot

Optical absorption coefficients and refractive index changes associated with intersubband transition in a parabolic cylinder quantum dot are theoretically investigated. In this regard, the electronic structure of the dot is studied using the one band effective mass theory, and by means of the compac...

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Bibliographic Details
Published in:Physics letters. A 2010-01, Vol.374 (4), p.637-643
Main Authors: Vahdani, M.R.K., Rezaei, G.
Format: Article
Language:English
Subjects:
Nonlinear optical properties
Parabolic cylinder coordinates
Quantum dots
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Summary:Optical absorption coefficients and refractive index changes associated with intersubband transition in a parabolic cylinder quantum dot are theoretically investigated. In this regard, the electronic structure of the dot is studied using the one band effective mass theory, and by means of the compact-density matrix approach the linear and nonlinear optical absorption coefficients and refractive index changes are calculated. The effects of the size of the dot, optical intensity and electromagnetic field polarization on the optical absorption coefficient and refractive index changes are investigated. It is found that absorption and refractive index changes are strongly affected not only by the size of the dot but also by optical intensity and the electromagnetic field polarization.
ISSN:0375-9601
1873-2429
DOI:10.1016/j.physleta.2009.11.038