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Journal of Materials
Volume 2013 (2013), Article ID 795450, 7 pages
http://dx.doi.org/10.1155/2013/795450
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.

Linked References

  1. P. M. Koenraad and M. E. Flatté, “Single dopants in semiconductors,” Nature Materials, vol. 10, no. 2, pp. 91–100, 2011. View at Publisher · View at Google Scholar · View at Scopus
  2. J. L. Movilla and J. Planelles, “Off-centering of hydrogenic impurities in quantum dots,” Physical Review B, vol. 71, Article ID 075319, 7 pages, 2005. View at Publisher · View at Google Scholar · View at Scopus
  3. C. P. Poole Jr. and F. J. Owens, Introduction to Nanotechnology, John Wiley & Sons, New York, NY, USA, 2003.
  4. M. J. Kelly, Low-Dimensional Semiconductors, Oxford University Press, Oxford, UK, 1995.
  5. W. Xie, “Nonlinear optical properties of an off-center donor in a quantum dot under applied magnetic field,” Solid State Communications, vol. 151, no. 7, pp. 545–549, 2011. View at Publisher · View at Google Scholar · View at Scopus
  6. W. Xie, “Impurity effects on optical property of a spherical quantum dot in the presence of an electric field,” Physica B, vol. 405, no. 16, pp. 3436–3440, 2010. View at Publisher · View at Google Scholar · View at Scopus
  7. R. Khordad, “Diamagnetic susceptibility of hydrogenic donor impurity in a V-groove GaAs/Ga1xAlxAs quantum wire,” European Physical Journal B, vol. 78, no. 3, pp. 399–403, 2010. View at Publisher · View at Google Scholar
  8. C. A. Duque, N. Porras-Montenegro, Z. Barticevic, M. Pacheco, and L. E. Oliveira, “Effects of applied magnetic fields and hydrostatic pressure on the optical transitions in self-assembled InAs/GaAs quantum dots,” Journal of Physics Condensed Matter, vol. 18, no. 6, pp. 1877–1884, 2006. View at Publisher · View at Google Scholar · View at Scopus
  9. Y. Yakar, B. Çakír, and A. Özmen, “Calculation of linear and nonlinear optical absorption coefficients of a spherical quantum dot with parabolic potential,” Optics Communications, vol. 283, no. 9, pp. 1795–1800, 2010. View at Publisher · View at Google Scholar · View at Scopus
  10. A. J. Peter, “Polarizabilities of shallow donors in spherical quantum dots with parabolic confinement,” Physics Letters A, vol. 355, no. 1, pp. 59–62, 2006. View at Publisher · View at Google Scholar · View at Scopus
  11. K. M. Kumar, A. J. Peter, and C. W. Lee, “Optical properties of a hydrogenic impurity in a confined Zn1xCdxSe/ZnSe spherical quantum dot,” Superlattices and Microstructures, vol. 51, no. 1, pp. 184–193, 2012. View at Publisher · View at Google Scholar
  12. B. Çakir, Y. Yakar, A. Özmen, M. Ö. Sezer, and M. Şahin, “Linear and nonlinear optical absorption coefficients and binding energy of a spherical quantum dot,” Superlattices and Microstructures, vol. 47, no. 4, pp. 556–566, 2010. View at Publisher · View at Google Scholar · View at Scopus
  13. S. Baskoutas, E. Paspalakis, and A. F. Terzis, “Electronic structure and nonlinear optical rectification in a quantum dot: effects of impurities and external electric field,” Journal of Physics Condensed Matter, vol. 19, no. 39, Article ID 395024, 9 pages, 2007. View at Publisher · View at Google Scholar · View at Scopus
  14. I. Karabulut and S. Baskoutas, “Second and third harmonic generation susceptibilities of spherical quantum dots: effects of impurities, electric field and size,” Journal of Computational and Theoretical Nanoscience, vol. 6, no. 1, pp. 153–156, 2009. View at Publisher · View at Google Scholar · View at Scopus
  15. I. Karabulut and S. Baskoutas, “Linear and nonlinear optical absorption coefficients and refractive index changes in spherical quantum dots: effects of impurities, electric field, size, and optical intensity,” Journal of Applied Physics, vol. 103, Article ID 073512, 5 pages, 2008. View at Publisher · View at Google Scholar · View at Scopus
  16. B. Gulveren, Ü. Atav, M. Sahin, and M. Tomak, “A parabolic quantum dot with N electrons and an impurity,” Physica E, vol. 30, pp. 143–149, 2005. View at Publisher · View at Google Scholar
  17. E. Räsänen, J. Könemann, R. J. Haug, M. J. Puska, and R. M. Nieminen, “Impurity effects in quantum dots: toward quantitative modeling,” Physical Review B, vol. 70, no. 11, Article ID 115308, 6 pages, 2004. View at Publisher · View at Google Scholar · View at Scopus
  18. M. Aichinger, S. A. Chin, E. Krotscheck, and E. Räsänen, “Effects of geometry and impurities on quantum rings in magnetic fields,” Physical Review B, vol. 73, no. 19, Article ID 195310, 8 pages, 2006. View at Publisher · View at Google Scholar
  19. S. Baskoutas and A. F. Terzis, “Binding energy of hydrogenic impurity states in an inverse parabolic quantum well under static external fields,” European Physical Journal B, vol. 69, no. 2, pp. 237–244, 2009. View at Publisher · View at Google Scholar · View at Scopus
  20. F. J. Betancur, J. Sierra-Ortega, R. A. Escorcia, J. D. González, and I. D. Mikhailov, “Density of impurity states in doped spherical quantum dots,” Physica E, vol. 23, no. 1-2, pp. 102–107, 2004. View at Publisher · View at Google Scholar
  21. F. J. Betancur, I. D. Mikhailov, and L. E. Oliveira, “Shallow donor states in GaAs-(Ga, Al)As quantum dots with different potential shapes,” Journal of Physics D, vol. 31, p. 3391, 1998. View at Publisher · View at Google Scholar
  22. S. V. Nistor, M. Stefan, L. C. Nistor, E. Goovaerts, and G. van Tendeloo, “Incorporation and localization of substitutional Mn2+ ions in cubic ZnS quantum dots,” Physical Review B, vol. 81, no. 3, Article ID 035336, 6 pages, 2010. View at Publisher · View at Google Scholar · View at Scopus
  23. S. V. Nistor, L. C. Nistor, M. Stefan et al., “Synthesis and characterization of Mn2+ doped ZnS nanocrystals self-assembled in a tight mesoporous structure,” Superlattices and Microstructures, vol. 46, no. 1-2, pp. 306–311, 2009. View at Publisher · View at Google Scholar · View at Scopus
  24. C. A. Duque, N. Porras-Montenegro, Z. Barticevic, M. Pacheco, and L. E. Oliveira, “Electron-hole transitions in self-assembled InAs/GaAs quantum dots: effects of applied magnetic fields and hydrostatic pressure,” Microelectronics Journal, vol. 36, no. 3–6, pp. 231–233, 2005. View at Publisher · View at Google Scholar · View at Scopus
  25. E. Paspalakis and A. F. Terzis, “Controlled excitonic population transfer in a quantum dot system interacting with an electromagnetic field: local field effects,” in Proceedings of the 5th International Conference on Microelectronics, Nanoelectronics and Optoelectronics, pp. 44–49, Prague, Czech Republic, 2006.
  26. A. Fountoulakis, A. F. Terzis, and E. Paspalakis, “Coherent single-electron transfer in coupled quantum dots,” Journal of Applied Physics, vol. 106, no. 7, Article ID 074305, 8 pages, 2009. View at Publisher · View at Google Scholar · View at Scopus
  27. N. K. Datta and M. Ghosh, “Oscillatory impurity potential induced dynamics of doped quantum dots: analysis based on coupled influence of impurity coordinate and impurity influenced domain,” Chemical Physics, vol. 372, no. 1–3, pp. 82–88, 2010. View at Publisher · View at Google Scholar · View at Scopus
  28. N. K. Datta and M. Ghosh, “The randomly fluctuating impurity strength initiated excitation in doped quantum dots,” Superlattices and Microstructures, vol. 51, no. 5, pp. 690–698, 2012. View at Publisher · View at Google Scholar
  29. N. K. Datta, S. Pal, and M. Ghosh, “Influence of relative confinement oscillation and concomitant oscillatory impurity domain on excitation profile of doped quantum dots,” Chemical Physics, vol. 400, pp. 44–50, 2012. View at Publisher · View at Google Scholar
  30. N. K. Datta, S. Pal, and M. Ghosh, “Influence of impurity propagation and concomitant enhancement of impurity spread on excitation profile of doped quantum dots,” Journal of Applied Physics, vol. 112, no. 1, Article ID 014324, 8 pages, 2012. View at Publisher · View at Google Scholar
  31. L. Jacak, P. Hawrylak, and A. Wojos, Quantum Dots, Springer, Berlin, Germany, 1998.
  32. T. Chakraborty, Quantum Dots-A Survey of the Properties of Artificial Atoms, Elsevier, Amsterdam, The Netherlands, 1999.
  33. W. Xie and J. Gu, “Exciton bound to a neutral donor in parabolic quantum dots,” Physics Letters A, vol. 312, no. 5-6, pp. 385–390, 2003. View at Publisher · View at Google Scholar · View at Scopus
  34. S. Baskoutas, A. F. Terzis, and E. Voutsinas, “Binding energy of donor states in a quantum dot with parabolic confinement,” Journal of Computational and Theoretical Nanoscience, vol. 1, no. 3, pp. 317–321, 2004. View at Publisher · View at Google Scholar · View at Scopus
  35. V. Halonen, P. Hyvönen, P. Pietiläinen, and T. Chakraborty, “Effects of scattering centers on the energy spectrum of a quantum dot,” Physical Review B, vol. 53, no. 11, pp. 6971–6974, 1996. View at Google Scholar
  36. V. Halonen, P. Pietiläinen, and T. Chakraborty, “Optical-absorption spectra of quantum dots and rings with a repulsive scattering centre,” Europhysics Letters, vol. 33, no. 5, pp. 377–382, 1996. View at Publisher · View at Google Scholar · View at Scopus
  37. J. Adamowski, A. Kwaśniowski, and B. Szafran, “LO-phonon-induced screening of electron-electron interaction in Dcentres and quantum dots,” Journal of Physics Condensed Matter, vol. 17, no. 28, pp. 4489–4500, 2005. View at Publisher · View at Google Scholar · View at Scopus
  38. S. Bednarek, B. Szafran, K. Lis, and J. Adamowski, “Modeling of electronic properties of electrostatic quantum dots,” Physical Review B, vol. 68, no. 15, Article ID 155333, 9 pages, 2003. View at Google Scholar · View at Scopus
  39. B. Szafran, S. Bednarek, and J. Adamowski, “Parity symmetry and energy spectrum of excitons in coupled self-assembled quantum dots,” Physical Review B, vol. 64, no. 12, Article ID 125301, 10 pages, 2001. View at Google Scholar · View at Scopus
  40. A. Gharaati and R. Khordad, “A new confinement potential in spherical quantum dots: modified gaussian potential,” Superlattices and Microstructures, vol. 48, no. 3, pp. 276–287, 2010. View at Publisher · View at Google Scholar · View at Scopus
  41. W. Xie, “Excited state absorptions of an exciton bound to an ionized donor impurity in quantum dots,” Optics Communications, vol. 284, no. 24, pp. 5730–5733, 2011. View at Publisher · View at Google Scholar