Relaxation of electron-hole pairs by coherent emission of LO-phonons in the quantum kinetic regime measured in CdZnTe quantum wells - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Physical Review B: Condensed Matter and Materials Physics (1998-2015) Année : 2008

Relaxation of electron-hole pairs by coherent emission of LO-phonons in the quantum kinetic regime measured in CdZnTe quantum wells

Résumé

We study the relaxation of excitons in CdZnTe quantum wells by emission of a LO-phonon cascade, ending with a trapping-in quantum dots. The state filling of the dots is measured in two-color pump-probe experiments. The observed optical-phonon emission time is found to be smaller (130 fs) than the phonon oscillation period (165 fs), showing that the interaction occurs in a quantum kinetic regime. This is evidenced by measuring the buildup of the phonon replica of an initially photocreated electron-hole pair distribution on a subpicosecond time scale.
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hal-00540834 , version 1 (29-11-2010)

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Steeve Cronenberger, Christelle Brimont, O. Cregut, Kuntheak Kheng, Henri Mariette, et al.. Relaxation of electron-hole pairs by coherent emission of LO-phonons in the quantum kinetic regime measured in CdZnTe quantum wells. Physical Review B: Condensed Matter and Materials Physics (1998-2015), 2008, 77 (19), pp.195311. ⟨10.1103/PhysRevB.77.195311⟩. ⟨hal-00540834⟩
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