Journal
PHYSICS LETTERS A
Volume 373, Issue 34, Pages 3079-3084Publisher
ELSEVIER
DOI: 10.1016/j.physleta.2009.06.042
Keywords
Lens-shaped quantum dots; Nonlinear optical properties
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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. (C) 2009 Elsevier B.V. All rights reserved.
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