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Sauvage S, Boucaud P, Lobo RP, et al. Long polaron lifetime in InAs/GaAs self-assembled quantum dots. Phys Rev Lett. 2002;88(17):177402doi: 10.1103/PhysRevLett.88.177402.
Sauvage, S., Boucaud, P., Lobo, R. P., Bras, F., Fishman, G., Prazeres, R., Glotin, F., Ortega, J. M., & Gérard, J. M. (2002). Long polaron lifetime in InAs/GaAs self-assembled quantum dots. Physical review letters, 88(17), 177402. https://doi.org/10.1103/PhysRevLett.88.177402
Sauvage, S, et al. "Long polaron lifetime in InAs/GaAs self-assembled quantum dots." Physical review letters vol. 88,17 (2002): 177402. doi: https://doi.org/10.1103/PhysRevLett.88.177402
Sauvage S, Boucaud P, Lobo RP, Bras F, Fishman G, Prazeres R, Glotin F, Ortega JM, Gérard JM. Long polaron lifetime in InAs/GaAs self-assembled quantum dots. Phys Rev Lett. 2002 Apr 29;88(17):177402. doi: 10.1103/PhysRevLett.88.177402. Epub 2002 Apr 12. PMID: 12005783.
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Phys Rev Lett. 2002 Apr 29;88(17):177402. doi: 10.1103/PhysRevLett.88.177402. Epub 2002 Apr 12.

Long polaron lifetime in InAs/GaAs self-assembled quantum dots.

Physical review letters

S Sauvage, P Boucaud, R P S M Lobo, F Bras, G Fishman, R Prazeres, F Glotin, J M Ortega, J-M Gérard

Affiliations

  1. Institut d'Electronique Fondamentale, Bâtiment 220, Université Paris-Sud, 91405 Orsay, France.

PMID: 12005783 DOI: 10.1103/PhysRevLett.88.177402

Abstract

We have investigated the polaron dynamics in n-doped InAs/GaAs self-assembled quantum dots by pump-probe midinfrared spectroscopy. A long T1 polaron decay time is measured at both low temperature and room temperature, with values around 70 and 37 ps, respectively. The decay time decreases for energies closer to the optical phonon energy. The relaxation is explained by the strong coupling for the electron-phonon interaction and by the finite lifetime of the optical phonons. We show that, even for a large detuning of 19 meV from the LO photon energy in GaAs, the carrier relaxation remains phonon assisted.

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