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Article Dans Une Revue Physical Review B: Condensed Matter and Materials Physics (1998-2015) Année : 2010

Subnanosecond delay of light in CdxZn1-xTe crystals

T. Godde
  • Fonction : Auteur
I.A. Akimov
  • Fonction : Auteur
D.R. Yakovlev
  • Fonction : Auteur
Henri Mariette
M. Bayer
  • Fonction : Auteur

Résumé

We study the excitonic polariton relaxation and propagation in bulk Cd0.88Zn0.12Te crystals using time-resolved photoluminescence and time-of-flight techniques. Propagation of picosecond optical pulses through a 745-mu m-thick crystal results in time delays up to 350 ps, depending on the photon energy. Optical pulses with 150 fs duration become strongly stretched while moving through the sample. The spectral dependence of the group velocity is consistent with the dispersion of the lower excitonic polariton branch. The lifetimes of excitonic polaritons in the upper and lower branches are 1.5 ns and 3 ns, respectively.

Dates et versions

hal-00997190 , version 1 (27-05-2014)

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Citer

T. Godde, I.A. Akimov, D.R. Yakovlev, Henri Mariette, M. Bayer. Subnanosecond delay of light in CdxZn1-xTe crystals. Physical Review B: Condensed Matter and Materials Physics (1998-2015), 2010, 82 (11), pp.115332. ⟨10.1103/PhysRevB.82.115332⟩. ⟨hal-00997190⟩

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