Time Evolution of the Microluminescence Energy οf GaN/AlGaN Quantum Dots

• Authors: K. Surowiecka , A. Wysmołek , R. Stępniewski , R. Bożek , K. Pakuła , J. Baranowski
• Languages of publication: EN

Abstracts

EN

Time evolution of the microphotoluminescence from low-density GaN/Al_{x}Ga_{1-x}N quantum dots grown by metal organic chemical vapor deposition using in situ etching of AlGaN is presented. The observed effect is related to the energy changes that begin immediately after sample illumination with the exciting laser light and saturate after some time. Typically, the luminescence energy decreases and the change is exponential with characteristic times in a range between several dozen and several hundred seconds. However, sometimes we observed the energy increase with characteristic times in a range between several and a few hundred seconds. The obtained results are discussed in terms of the metastable change of the electric field, induced by spontaneous polarization present in GaN/AlGaN structure (in the growth direction), and strain- or defect-induced changes of the electric field in the vicinity of the dot.

Keywords

EN

78.55.Cr; 78.67.Hc

Discipline

• 78.55.Cr: III-V semiconductors
• 78.67.Hc: Quantum dots

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2009
• Volume: 116
• Issue: 5
• Pages: 933-935

Dates

published

2009-11

Contributors

author

K. Surowiecka

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

author

A. Wysmołek

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

author

R. Stępniewski

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

author

R. Bożek

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

author

K. Pakuła

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

author

J. Baranowski

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

References

• 1. T. Bretagnon, P. Lefebvre, P. Valvin, R. Bardoux, T. Guillet, T. Taliercio, B. Gil, N. Grandjean, F. Semond, B. Damilano, A. Dussaigne, J. Massies, Phys. Rev. B 73, 113304 (2006)
• 2. M. Nirmal, B.O. Dabbousi, M.G. Bawendi, J.J. Macklin, J.K. Trautman, T.D. Harris, L.E. Brus, Nature (London) 383, 802 (1996)
• 3. N. Panev, M.-E. Pistol, V. Zwiller. L. Samuelson, W. Jiang, B. Xu, Z. Wang, Phys. Rev. B 64, 045317 (2001)
• 4. S.A. Empedocles, D.J. Norris, M.G. Bawendi, Phys. Rev. Lett. 77, 3873 (1996)
• 5. F. Rol, S. Founta, H. Mariette, B. Daudin, Le Si Dang, J. Bleuse, D. Peyrade, J.-M. Gerard, B. Gayra, Phys. Rev. B 75, 125306 (2007)
• 6. J. Rice, J. Robinson, A. Jarjour, R. Taylor, R. Olivier, G. Andrew, D. Briggs, M. Kappers, C. Humpreys, Appl. Phys. Lett. 84, 4110 (2004)
• 7. J. Seufert, R. Weigand, G. Bacher, T. Kümmell, A. Forchel, K. Leonardi, D. Hommel, Appl. Phys. Lett. 76, 1872 (2000)
• 8. K. Surowiecka, A. Wysmołek, R. Stępniewski, R. Bożek, K. Pakuła, J. Baranowski, Acta Phys. Pol. A 108, 879 (2005)
• 9. K. Pakuła, R. Bożek, K. Surowiecka, R. Stępniewski, A. Wysmołek, J. Baranowski, J. Cryst. Growth 289, 472 (2006)
• 10. W. Heller, U. Bockelmann, G. Abstreiter, Phys. Rev. B 57, 6270 (1997)
• 11. T. Nakaoka, S. Kako, Y. Arakawa, Phys. Rev. B 73, 121305 (2005)

Identifiers

DOI

10.12693/APhysPolA.116.933