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Journal of Materials
Volume 2013 (2013), Article ID 795450, 7 pages
Research Article

Influence of Oscillatory Impurity Potential and Concurrent Gasping of Impurity Spread on Excitation Profile of Doped Quantum Dots

1Department of Chemistry, Hetampur Raj High School, Hetampur, Birbhum, West Bengal 731124, India
2Department of Chemistry, Physical Chemistry Section, Visva-Bharati University, Santiniketan, Birbhum, West Bengal 731235, India

Received 12 December 2012; Accepted 19 January 2013

Academic Editor: Giancarlo Righini

Copyright © 2013 Suvajit Pal 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.


Excitation in quantum dots is an important phenomenon. Realizing the importance we investigate the excitation behavior of a repulsive impurity-doped quantum dot induced by simultaneous oscillations of impurity potential and spatial stretch of impurity domain. The impurity potential has been assumed to have a Gaussian nature. The ratio of two oscillations () has been exploited to understand the nature of excitation rate. Indeed it has been found that the said ratio could fabricate the excitation in a remarkable way. The present study also indicates attainment of stabilization in the excitation rate as soon as η surpasses a threshold value regardless of the dopant location. However, within the stabilization zone we also observe maximization in the excitation rate at some typical location of dopant incorporation. The critical analysis of pertinent impurity parameters provides important perception about the physics behind the excitation process.