Dynamics of Excitation Transfer Inside InAs/GaAs Quantum Dot System

• Authors: K. Korona , A. Babiński , S. Raymond , Z. Wasilewski
• Languages of publication: EN

Abstracts

EN

We present time-resolved photoluminescence investigations of InAs/GaAs structures containing quantum dots with the ground state at 1.43 eV. State filling effect and a Pauli blocking effect were clearly observed. These effects significantly influenced dynamics of excitation transfer from upper to lower state inside a dot leading to non-exponential dynamics. Numerical model based on nonlinear rate equations was proposed. The model described well the experimental data providing values of: lifetime of the ground state 0.53±0.03 ns, lifetime of excited state (when the ground state is full) 1.1±0.2 ns, and internal relaxation time (when the ground state is empty) 0.07±0.01 ns.

Keywords

EN

78.47.+p; 72.20.Jv; 78.67.Hc; 78.55.Cr

Discipline

• 78.55.Cr: III-V semiconductors
• 78.67.Hc: Quantum dots
• 72.20.Jv: Charge carriers: generation, recombination, lifetime, and trapping

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2006
• Volume: 110
• Issue: 2
• Pages: 219-224

Dates

published

2006-08

received

2006-06-17

Contributors

author

K. Korona

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

author

A. Babiński

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

author

S. Raymond

• Institute for Microstructural Sciences, NRC Canada, Ottawa, Canada

author

Z. Wasilewski

• Institute for Microstructural Sciences, NRC Canada, Ottawa, Canada

References

• 1. A. Babiński, S. Raymond, Z. Wasilewski, J. Lapointe, M. Potemski, Acta Phys. Pol. A, 105, 547, 2004
• 2. R. Oulton, J.J. Finley, A.I. Tartakovskii, D.J. Mowbray, M.S. Skolnick, M. Hopkinson, A. Vasanelli, R. Ferreira, G. Bastard, Phys. Rev. B, 68, 235301, 2003
• 3. S. Grosse, J.H.H. Sandmann, G. von Plessen, J. Feldmann, H. Lipsanen, M. Sopanen, J. Tulkki, J. Ahopelto, Phys. Rev. B, 55, 4473, 1997
• 4. V. Zwiller, M.-E. Pistol, D. Hessman, R. Cederstrom, W. Seifert, L. Samuelson, Phys. Rev. B, 59, 5021, 1999
• 5. J.A. Rossi, C.M. Wolfe, G.E. Stillman, J.O. Dimmock, Solid State Commun., 8, 2021, 1970
• 6. B.J. Skromme, T.S. Low, T.J. Roth, G.E. Stillmann, J.K. Kennedy, J.K. Abrokwah, J. Electron. Mater., 12, 433, 1983
• 7. K.P. Korona, Phys. Rev. B, 65, 235312, 2002
• 8. R.E. Bellman, R.E. Kalba, J. Locket, Numerical Inversion of the Laplace Transform, Elsevier, New York 1966

Identifiers

DOI

10.12693/APhysPolA.110.219