Linear and nonlinear optical properties of a hydrogenic donor in lens-shaped quantum dots

Optical transitions in a Lens-Shaped Quantum Dot (LSD) are investigated in the presence of a hydrogenic impurity. The electronic wave functions are obtained analytically and the energy eigenvalues are calculated numerically. The density matrix formulation with the intersubband relaxation are used to...

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Bibliographic Details
Published inPhysics letters. A Vol. 373; no. 34; pp. 3079 - 3084
Main Authors Vahdani, M.R.K., Rezaei, G.
Format Journal Article
LanguageEnglish
Published Elsevier B.V 17.08.2009
Subjects
Lens-shaped quantum dots
Nonlinear optical properties
42.65.-k
Nonlinear optical properties
Lens-shaped quantum dots
73.63.Kv
73.21.La
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Summary:Optical transitions in a Lens-Shaped Quantum Dot (LSD) are investigated in the presence of a hydrogenic impurity. The electronic wave functions are obtained analytically and the energy eigenvalues are calculated numerically. The density matrix formulation with the intersubband relaxation are used to evaluate the (linear and third order nonlinear) absorption coefficient (AC) and the change in the refractive indices (RI) analytically. The effect of the size of the LSD and optical intensity on the AC and RI are investigated. It is found that AC and RI are strongly affected by the optical intensity and the size of the LSD.
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
ISSN:0375-9601
1873-2429
DOI:10.1016/j.physleta.2009.06.042