We have studied the low-temperature photoluminescence (PL) of the self-assembled InAs single quantum dots (QDs) using conventional micro-PL setup to detect PL from an individual QD. It is demonstrated, that at certain experimental conditions, what concerns the laser excitation energy, the laser power and the crystal temperature, several additional lines, redshifted relative to the ground state transition, appear in the PL spectra. These are interpreted in terms of charged exciton complexes which form due to the population of quantum dots with a nonequal amount of electrons and holes. The latter phenomenon is determined by the excess energies of photogenerated carriers and is proposed as an effective optical method to create and study charged exciton complexes in QDs.
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1 December 2002
Research Article|
December 01 2002
Formation of the charged exciton complexes in self-assembled InAs single quantum dots
E. S. Moskalenko;
E. S. Moskalenko
A.F. Ioffe Physical-Technical Institute, RAS, 194021, Polytechnicheskaya 26, St. Petersburg, Russia and Department of Physics and Measurement Technology, Linköping University, S-581 83 Linköping, Sweden
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K. F. Karlsson;
K. F. Karlsson
Department of Physics and Measurement Technology, Linköping University, S-581 83 Linköping, Sweden
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P. O. Holtz;
P. O. Holtz
Department of Physics and Measurement Technology, Linköping University, S-581 83 Linköping, Sweden
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B. Monemar;
B. Monemar
Department of Physics and Measurement Technology, Linköping University, S-581 83 Linköping, Sweden
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W. V. Schoenfeld;
W. V. Schoenfeld
Department of Materials, University of California, Santa Barbara, California 93106
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J. M. Garcia;
J. M. Garcia
Department of Materials, University of California, Santa Barbara, California 93106
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P. M. Petroff
P. M. Petroff
Department of Materials, University of California, Santa Barbara, California 93106
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J. Appl. Phys. 92, 6787–6793 (2002)
Article history
Received:
June 11 2002
Accepted:
August 30 2002
Citation
E. S. Moskalenko, K. F. Karlsson, P. O. Holtz, B. Monemar, W. V. Schoenfeld, J. M. Garcia, P. M. Petroff; Formation of the charged exciton complexes in self-assembled InAs single quantum dots. J. Appl. Phys. 1 December 2002; 92 (11): 6787–6793. https://doi.org/10.1063/1.1516871
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