Long Decays of Excitonic Photoluminescence from CdTe/ZnTe Individual Quantum Dots

• Authors: B. Piechal , J. Suffczyński , A. Trajnerowicz , M. Goryca , P. Kossacki , A. Golnik , J. Gaj
• Languages of publication: EN

Abstracts

EN

We present time-resolved micro-photoluminescence study of self-assembled CdTe/ZnTe quantum dots. In addition to the fast radiative decay of the exciton, we observe long components, being of the order of a few nanoseconds. We observe that long decays are present for neutral exciton lines as well as on the biexciton ones. The temperature dependent measurements reveal the non-monotonic behaviour. We find also that the long decays are not mono-exponential. We conclude that the dark exciton states cannot be treated as the only source of long decays in the luminescence. We propose other possible explanation, which is the slowing of luminescence by carrier trapping in high energy states in quantum dots and barriers.

Keywords

EN

78.47.+p; 78.67.Hc; 78.55.Et

Discipline

• 78.55.Et: II-VI semiconductors
• 78.67.Hc: Quantum dots

• Journal: Acta Physica Polonica A
• Year: 2005
• Volume: 108
• Issue: 5
• Pages: 831-836

Dates

published

2005-11

received

2005-06-04

Contributors

author

B. Piechal

• Institute of Experimental Physics, Warsaw University, Hoża 69, 00-681 Warsaw, Poland

author

J. Suffczyński

• Institute of Experimental Physics, Warsaw University, Hoża 69, 00-681 Warsaw, Poland

author

A. Trajnerowicz

• Institute of Experimental Physics, Warsaw University, Hoża 69, 00-681 Warsaw, Poland

author

M. Goryca

• Institute of Experimental Physics, Warsaw University, Hoża 69, 00-681 Warsaw, Poland

author

P. Kossacki

• Institute of Experimental Physics, Warsaw University, Hoża 69, 00-681 Warsaw, Poland

author

A. Golnik

• Institute of Experimental Physics, Warsaw University, Hoża 69, 00-681 Warsaw, Poland

author

J. Gaj

• Institute of Experimental Physics, Warsaw University, Hoża 69, 00-681 Warsaw, Poland

References

• 1. C. Santori, M. Pelton, G. Solomon, Y. Dale, Y. Yamamoto, Phys. Rev. Lett., 86, 1502, 2001
• 2. E. Moreau, I. Robert, L. Manin, V. Thierry-Mieg, J.M. Gérard, I. Abram, Phys. Rev. Lett., 87, 183601, 2001
• 3. C. Couteau, S. Moehl, F. Tinjod, J.M. Gérard, K. Kheng, H. Mariette, J.A. Gaj, R. Romestain, J.P. Poizat, Appl. Phys. Lett., 85, 6251, 2004
• 4. F. Tinjod, B. Gilles, S. Moehl, K. Kheng, H. Mariette, Appl. Phys. Lett., 82, 4340, 2003
• 5. J. Jasny, J. Sepiol, Chem. Phys. Lett., 273, 439, 1997
• 6. L. Besombes, K. Kheng, L. Marsal, H. Mariette, Phys. Rev. B, 65, 121314, 2002
• 7. A. Kudelski, K. Kowalik, A. Golnik, G. Karczewski, J. Kossut, J.A. Gaj, J. Lumin., 112, 127, 2005
• 8. R.G. Palmer, D.L. Stein, E. Abrahams, P.W. Anderson, Phys. Rev. Lett., 53, 958, 1984
• 9. R. Kohlrausch, Ann. Phys. (Leipzig), 12, 393, 1947, Ann. Phys. (Leipzig) 12, 393, 1847

Identifiers

DOI

10.12693/APhysPolA.108.831