Bottleneck effects in the relaxation and photoluminescence of microcavity polaritons

F. Tassone, C. Piermarocchi, V. Savona, A. Quattropani, and P. Schwendimann
Phys. Rev. B 56, 7554 – Published 15 September 1997
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Abstract

A theoretical model for the investigation of the dynamics of microcavity polaritons in the strong-coupling regime is proposed. The resulting photoluminescence dynamics at small angles is studied as a function of the angle of observation, the cavity detuning, the lattice, and the free-carrier temperature. For small detunings, the strong dispersion of the microcavity polaritons at small angles results in a bottleneck relaxation dynamics, similar to the bulk one. However, important differences, related to the reduced dimensionality of the system, are found. In particular, a larger emission from the upper polariton with respect to the lower polariton is found for any temperature. Moreover, a two-lobe angular emission from the lower branch is also expected. In the case of large pump excess energies, when hot carriers are injected into the system, longitudinal-optical-phonon emission has also been considered as a possible polariton formation mechanism, and shown to reduce only partially the effects summarized above.

  • Received 12 May 1997

DOI:https://doi.org/10.1103/PhysRevB.56.7554

©1997 American Physical Society

Authors & Affiliations

F. Tassone

  • Ginzton Laboratory
  • ERATO Quantum Fluctuation Project, Stanford University, Stanford, California 94305

C. Piermarocchi, V. Savona, and A. Quattropani

  • Institut de Physique Théorique, Ecole Polytechnique Fédérale, CH-1015 Lausanne, Switzerland

P. Schwendimann

  • Defense Procurement and Technology Agency, System Analysis Division, CH-3003 Bern, Switzerland

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Vol. 56, Iss. 12 — 15 September 1997

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