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Communication Dans Un Congrès Année : 2007

Excitonic spin relaxation in GaN

Christelle Brimont
M. Gallart
O. Cregut
  • Fonction : Auteur
B. Hoenerlage
  • Fonction : Auteur
P. Gilliot
  • Fonction : Auteur

Résumé

By performing non-degenerate pump-probe experiments, we study the relaxation dynamics of spin-polarized A and B excitons in wurtzite epitaxial GaN. We show that the spin relaxation of the exciton as a whole is negligible with regard to the spin relaxation of the individual carriers. We determined T-e = 15 ps for the electron in the conduction band, T-hh = 5 ps, and T-lh = 1.5 ps for the heavy hole (HH) and for the light hole (LH), respectively. The quite long HH relaxation time can be related to the band structure in which the degeneracy between different spin-valence bands is lifted.
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Dates et versions

hal-00545176 , version 1 (09-12-2010)

Identifiants

  • HAL Id : hal-00545176 , version 1

Citer

Christelle Brimont, M. Gallart, O. Cregut, B. Hoenerlage, P. Gilliot. Excitonic spin relaxation in GaN. 10th Colloquium on Lasers and Quantum Optics (COLOQ 10), Jul 2007, Grenoble (FRANCE), France. pp.115-117. ⟨hal-00545176⟩
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