Skip to main content

Effect of In and Al interdiffusion on electron states and light absorption in InxGa1−x As/AlyGa1−y As quantum dots

Abstract

A new method of theoretical investigation of the interdiffusion effect on electron states in quantum dots is proposed. The main point of the method is the replacement of the “veritable” confining potential formed due to the diffusion by a model potential, for which the Schrödinger equation solutions and the energy spectrum are known. In the framework of the proposed method we calculate the positions of edges of the conduction and heavy hole bands and the absorption coefficient of interband transitions depending on the diffusion length in spherical InxGa1−x As/AlyGa1−y As quantum dots, using the Wood-Saxon potential as a model one.

This is a preview of subscription content, access via your institution.

References

  1. Malik, S., Roberts, C., et al., Appl. Phys. Lett., 1997, vol. 71, p. 1987.

    Article  ADS  Google Scholar 

  2. Schlesinger, T.E. and Kuech, T., Appl. Phys. Lett., 1986, vol. 49, p. 519.

    Article  ADS  Google Scholar 

  3. Gunawan, O., Djie, H.S., and Ooi, B.S., Phys. Rev. B, 2005, vol. 71, p. 205319.

    Article  ADS  Google Scholar 

  4. Gillin, W.P., Dunstan, D.J., Homewood, K.P., Howard, L.K., and Sealy, B.J., J. Appl. Phys., 1993, vol. 73, p. 3782.

    Article  ADS  Google Scholar 

  5. Leon, R., Fafard, S., Piva, P.G., Ruvimov, S., and Liliental-Weber, Z., Phys. Rev. B, 1998, vol. 58, p. R4262.

    Article  ADS  Google Scholar 

  6. Lobo, C., Leon, R., Fafard, S., and Piva, P.G., Appl. Phys. Lett., 1998, vol. 72, p. 2850.

    Article  ADS  Google Scholar 

  7. Yalin Ji, Wei Lu, Guibin Chen, Xiaoshuang Chen, and Qing Wangjuvydot, J. Appl. Phys., 2003, vol. 93, p. 1208.

    Article  ADS  Google Scholar 

  8. Wang, X.C. et al., J. Appl. Phys., 1999, vol. 86, p. 2687.

    Article  ADS  Google Scholar 

  9. Fafard, S. and Allen, C.N., Appl. Phys. Lett., 1999, vol. 75, p. 2374.

    Article  ADS  Google Scholar 

  10. Xu, S.J. and Wang, X.C., Appl. Phys. Lett., 1998, vol. 72, p. 3335.

    Article  ADS  Google Scholar 

  11. Takeuchi, K. and Moldauer, P.A., Phys. Lett. B, 1969, vol. 28, p. 384.

    Article  ADS  Google Scholar 

  12. Leon, R., Williams, D.R.M., Krueger, J., Weber, E.R., and Melloch, M.R., Phys. Rev. B, 1997, vol. 56, p. R4336.

    Article  ADS  Google Scholar 

  13. Lojewski, Z., Nerlo-Pomorska, B., Pomorski, K., and Dudek, J., Phys. Rev. C, 1995, vol. 51, p. 601.

    Article  ADS  Google Scholar 

  14. Abdullah, M.N.A., Das, S.K., and Tariq, A.S.B., J. Phys. G, 2003, vol. 29, p. 1259.

    Article  ADS  Google Scholar 

  15. Bespalova, O.V., Romanovsky, E.A., and Spasskaya, T.I., J. Phys. G, 2003, vol. 29, p. 1193.

    Article  ADS  Google Scholar 

  16. Barker, J.A. and O’Railly, E.P., Phys. E, 1999, vol. 4, p. 231.

    Article  Google Scholar 

  17. Adachi, S., Appl. Phys., 1985, vol. 53, p. R1.

    ADS  Google Scholar 

  18. Flügge, S., Practical Quantum Mechanics, vol. 1, Moscow: Mir, 1974.

    Google Scholar 

  19. Basu, P.K., Theory of Optical Processes in Semiconductors, Bulk and Microstructures, Oxford: Clarendon Press, 1997.

    Google Scholar 

Download references

Author information

Authors and Affiliations

Authors

Additional information

Original Russian Text © V.N. Mughnetsyan, A.A. Kirakosyan, 2007, published in Izvestiya NAN Armenii, Fizika, 2007, Vol. 42, No. 2, pp. 83–91.

About this article

Cite this article

Mughnetsyan, V.N., Kirakosyan, A.A. Effect of In and Al interdiffusion on electron states and light absorption in InxGa1−x As/AlyGa1−y As quantum dots. J. Contemp. Phys. 42, 55–61 (2007). https://doi.org/10.3103/S1068337207020038

Download citation

  • Received:

  • Issue Date:

  • DOI: https://doi.org/10.3103/S1068337207020038

PACS numbers

  • 73.21.La

Key words

  • quantum dots
  • interdiffusion