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Optical Properties of Semimagnetic Quantum Dots

Published online by Cambridge University Press:  11 February 2011

S. Mackowski ,
T. A. Nguyen ,
H. E. Jackson ,
L. M. Smith ,
J. Kossut ,
G. Karczewski  and
W. Heiss
S. Mackowski*
Affiliation:
Dept. of Physics, Univ. of Cincinnati, Cincinnati, OH 45221–0011, United States
T. A. Nguyen
Affiliation:
Dept. of Physics, Univ. of Cincinnati, Cincinnati, OH 45221–0011, United States
H. E. Jackson
Affiliation:
Dept. of Physics, Univ. of Cincinnati, Cincinnati, OH 45221–0011, United States
L. M. Smith
Affiliation:
Dept. of Physics, Univ. of Cincinnati, Cincinnati, OH 45221–0011, United States
J. Kossut
Affiliation:
Institute of Physics, Polish Academy of Science, Warsaw, Poland
G. Karczewski
Affiliation:
Institute of Physics, Polish Academy of Science, Warsaw, Poland
W. Heiss
Affiliation:
Institut für Festkörperphysik, Johannes Kepler Universität Linz, Austria
*
corresponding author, electronic mail: seb@physics.uc.edu
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Abstract

Measurements of optical properties of epitaxially grown CdMnTe quantum dots are presented. Magnetic ions are incorporated into the structure by passivating the substrate surface with Mn prior the quantum dot deposition. As expected, the intensity of intra-Mn transition increases with the time of manganese passivation. The formation of magnetic quantum dots is evidenced by presence of single emission lines in the micro-photoluminescence spectrum. The width of single dot emission lines is much broader than observed for non-magnetic quantum dots. The broadening is caused by thermal fluctuations of magnetization in quantum dots. Resonant spectroscopy results indicate that the exciton-optical phonon scattering is the main energy relaxation mechanism in these structures. The measurements suggest that post-growth thermal processing offers the possibility of tuning the magnetic properties of these structures.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 737 , 2002 , E9.1
Copyright
Copyright © Materials Research Society 2003

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References

REFERENCES

Bacher, G., Maksimov, A.A., McDonald, A., Schomig, H., Welsch, M.K., Kulakovskii, V.D., Forchel, A., Becker, C.R., Molenkamp, L.W. and Landwehr, G., phys. stat. sol. b 224, 573 (2001)Google Scholar
Kossut, J., Acta Phys. Pol. A 100, 111 (2001)Google Scholar
3. Kratzert, P.R., Puls, J., Rabe, M. and Henneberger, F., Appl. Phys. Lett. 79, 2814 (2001)Google Scholar
4. Seufert, J., Bacher, G., Scheibner, M., Forchel, A., Lee, S., Dobrowolska, M. and Furdyna, J.K., Phys. Rev. Lett. 88, 027402 (2002)Google Scholar
5. Mackowski, S., Wróbel, J., Fronc, K., Kossut, J., Pulizzi, F., Christianen, P.C.M., Maan, J.C. and Karczewski, G., phys. stat. sol. b 229, 493 (2002)Google Scholar
6. Shibata, K., Nakayama, E., Souma, I., Murayama, A., and Oka, Y., phys. stat. sol. b 229, 473 (2002)Google Scholar
7. Mackowski, S., Lee, S., Furdyna, J.K., Dobrowolska, M., Prechtl, G., Heiss, W., Kossut, J. and Karczewski, G., phys. stat. sol. b 229, 469 (2002)Google Scholar
8. Brazis, R. and Kossut, J., Sol. State Comm. 122, 73 (2002)Google Scholar
9. Mackowski, S. and Gaj, J. A., Defect and Diffusion Forum 173–174, 47 (1999)Google Scholar
10. Bacher, G., Kummell, T., Eisert, D., Forchel, A., Konig, B., Ossau, W., Becker, C.R., Landwehr, G., Appl. Phys. Lett. 75, 956 (1999)Google Scholar
11. Karczewski, G., Mackowski, S., Kutrowski, M, Wojtowicz, T. and Kossut, J., Appl. Phys. Lett. 74, 3011 (1999)Google Scholar
12. Kummell, T., Weigand, R., Bacher, G., Forchel, A., Leonardi, K., Hommel, D. and Selke, H., Appl. Phys. Lett. 73, 3105 (1998)Google Scholar
13. Rho, H., Robinson, L.M., Mukolobwiez, N., Smith, L. M., Jackson, H.E., Lee, S., Dobrowolska, M., and Furdyna, J.K., Physica E 11, 59 (2001)Google Scholar
14. Kim, C.S., Kim, M., Lee, S., Kossut, J., Furdyna, J.K. and Dobrowolska, M., J. Cryst. Growth 214/215, 395 (2000)Google Scholar
15. Gammon, D., Snow, E. S., Shanabrook, B. V., Katzer, D. S. and Park, D., Phys. Rev. Lett. 76, 3005 (1996)Google Scholar
16. Malik, S., Roberts, Ch., Murray, R., and Pate, M., Appl. Phys. Lett. 71, 1987 (1997)Google Scholar
17. Mackowski, S., Khoi, Nguyen The, Golnik, A., Kossacki, P., Gaj, J. A., Kamińska, E., Piotrowska, A., Karczewski, G., Wojtowicz, T., Kossut, J., Sol. State Comm. 107, 267 (1998)Google Scholar