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Femtosecond measurement of electron capture and intersubband relaxation in self-organized InAs quantum wires on In1xAlxAs/InP

E. Péronne, T. Polack, J. F. Lampin, F. Fossard, F. Julien, J. Brault, M. Gendry, O. Marty, and A. Alexandrou
Phys. Rev. B 63, 081307(R) – Published 7 February 2001
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Abstract

We have investigated the electron dynamics in high-density InAs self-organized quantum wires on In1xAlxAs/InP(001) using pump-probe transmission with a midinfrared probe tuned to an intersubband transition in the conduction band. At low carrier densities, we have measured an effective capture time from the barrier to the first electron subband of 3 ps, longer than in quantum wells, and an intersubband scattering time from the second to the first subband of 0.4±0.1ps. We attribute both processes to the interaction with LO phonons. For carrier densities above 3×105cm1, Auger processes lead to larger capture rates.

  • Received 27 October 2000

DOI:https://doi.org/10.1103/PhysRevB.63.081307

©2001 American Physical Society

Authors & Affiliations

E. Péronne1, T. Polack1, J. F. Lampin1,*, F. Fossard2, F. Julien2, J. Brault3, M. Gendry3, O. Marty4, and A. Alexandrou1

  • 1Laboratoire d’Optique Appliquée Ecole Polytechnique-Ecole Nationale Supérieure de Techniques Avancées UMR CNRS 7639, Centre de l’Yvette, F-91761 Palaiseau Cedex, France
  • 2Institut d’Electronique Fondamentale, Université Paris-Sud UMR CNRS 8622, F-91405 Orsay, France
  • 3Laboratoire d’Electronique-LEOM, Ecole Centrale de Lyon UMR CNRS 5512, F-69131 Ecully, France
  • 4Laboratoire d’Electronique-LENAC, Université Lyon 1, F-69622 Villeurbanne Cedex

  • *Present address: IEMN-Dpt.ISEN, BP 69, 59652 Villeneuve d’Ascq Cedex, France.

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Vol. 63, Iss. 8 — 15 February 2001

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