Table of Contents
ISRN Optics
Volume 2012, Article ID 847532, 8 pages
http://dx.doi.org/10.5402/2012/847532
Research Article

Impurity Modulated Static Linear and First Nonlinear Polarizabilities of Doped Quantum Dots

1Department of Physics, Suri Vidyasagar College, Suri, Birbhum 731101, West Bengal, India
2Department of Chemistry, Physical Chemistry Section, Visva Bharati University, Santiniketan, Birbhum 731235, West Bengal, India

Received 7 January 2012; Accepted 26 February 2012

Academic Editors: G. Bellanca, D. Cojoc, E. Lidorikis, and G. Ma

Copyright Β© 2012 Nirmal Kr Datta and Manas Ghosh. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

We explore the pattern of linear and first nonlinear optical (NLO) response of repulsive impurity doped quantum dots harmonically confined in two dimensions. The dopant impurity potential chosen assumes Gaussian form. The quantum dot is subject to a static electric field. For some fixed values of transverse magnetic field strength (πœ”π‘), and harmonic confinement potential (πœ”0), the influence of impurity strength (𝑉0), impurity stretch (πœ‰), and impurity location (π‘Ÿ0) on the diagonal components of static linear (𝛼π‘₯π‘₯ and 𝛼𝑦𝑦), and the first NLO (𝛽π‘₯π‘₯π‘₯ and 𝛽𝑦𝑦𝑦) responses of the dot are computed through linear variational route. The investigation reveals the crucial roles played by the various impurity parameters in modulating these optical responses. Interestingly, maximization in the first NLO responses has been observed for some particular dopant location and at some particular value of spatial stretch of the dopant.