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Few-Particle Effects in Nonlinear Optical Spectra of Semiconductor Quantum Dots

Published online by Cambridge University Press:  10 February 2011

Ulrich Hohenesteri ,
Fausto Rossi  and
Elisa Molinari
Ulrich Hohenesteri
Affiliation:
Istituto Nazionale per la Fisica della Materia (INFM) E-mail: hohenester@unimo.it; FAX: +39 059 387488 Departimento di Fisica, Università di Modena, Via Campi 213/A, I-41100, Modena, Italy
Fausto Rossi
Affiliation:
Istituto Nazionale per la Fisica della Materia (INFM) Departimento di Fisica, Politecnico di Torino, C. Duca degli Abruzzi 24, I-10129, Torino, Italy
Elisa Molinari
Affiliation:
Istituto Nazionale per la Fisica della Materia (INFM) Departimento di Fisica, Università di Modena, Via Campi 213/A, I-41100, Modena, Italy
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Abstract

We present a density-matrix approach for the description of nonequilibrium carrier dynamics in optically excited semiconductor quantum dots, that explicitly accounts for exciton-exciton as well as exciton-carrier interactions. Within this framework, we analyze few-particle effects in the optical spectra and provide a consistent description of additional peaks appearing at high photoexcitation density. We discuss possible applications of such optical nonlinearities in future coherent-control experiments.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 571: Symposium W – Semiconductor Quantum Dots , 1999 , 241
Copyright
Copyright © Materials Research Society 2000

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References

REFERENCES

1. Ashoori, R. C., Nature 379, 413 (1996): L. P. Kouwenhoven, et al, in Mesoscopic Electron Transport, edited by L. Sohn, et al, (Kluwer, Dordrecht, 1997), p. 105.10.1038/379413a0Google Scholar
2. Motohisa, J., Baumberg, J. J., Heberle, A. P., Allam, J., Solid-State Electronics 42, 1335 (1998); L. Landin, M. S. Miller, M. E. Pistol, C. E. Pryor, L. Samuelson, Science 280, 262 (1998); E. Dekel, D. Gershoni, E. Ehrenfreund, D. Spektor, J. M. Garcia, M. Petroff, Phys. Rev. Lett. 80, 4991 (1998); F. Vouillez, D. Y. Oberli, F. Lelarge, B. Dwir, and E. Kapon, Solid State Commun. 108, 945 (1998).10.1016/S0038-1101(98)00027-6Google Scholar
3. Heberle, A. P., Baumberg, J. J., Köhler, K., Phys. Rev. Lett. 75, 2598 (1995).10.1103/PhysRevLett.75.2598Google Scholar
4. Bonadeo, N. H., Erland, J., Gammon, D., Park, D., Katzer, D. S., Steel, D. G., Science 282, 1473 (1998).10.1126/science.282.5393.1473Google Scholar
5. Haug, H. and Koch, S. W., Quantum Theory of the Optical and Electronic Properties of Semiconductors (World Scientific, Singapore, 1993).10.1142/1977Google Scholar
6. Rossi, F., Semic. Sci. Technol. 13, 147 (1998).10.1088/0268-1242/13/2/001Google Scholar
7. Axt, V. M. and Mukamel, S., Rev. Mod. Phys. 70, 145 (1998); Th. Oestreich, K. Schoenhammer, and L. J. Sham, Phys. Rev. B 58, 12920 (1998).10.1103/RevModPhys.70.145Google Scholar
8. Hohenester, U. and Pötz, W., Phys. Rev. B 56, 13177 (1997).10.1103/PhysRevB.56.13177Google Scholar
9. Jacak, L., Hawrylak, P., and Wojs, A., Quantum Dots (Springer, Berlin, 1998).10.1007/978-3-642-72002-4Google Scholar
10. Rossi, F. and Molinari, E., Phys. Rev. Lett. 76, 3642 (1996); Phys. Rev. B 53, 16462 (1996).10.1103/PhysRevLett.76.3642Google Scholar
11. In our cylindrical QD the confinement energies due to the in-plane parabolic potential are for electrons, and for holes; with this choice, electron and hole wavefunctions have the same lateral extension. The quantum-well confinement along z is such that the intersubband splittings are much larger than . At zero magnetic field the n-th excited electron (hole) eigenstate is then n-fold degenerate. Material parameters for GaAs are used.Google Scholar
12. We also computed the optical response from the SBE. Indeed, we find the results expected within the simple Bloch-vector model [5]: practically all density can be removed for δø=18 0°, or NX can be doubled for δø=0°.Google Scholar