1. Subnanosecond delay of light in CdxZn1-xTe crystals
- Author
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Godde, T., Akimov, I.A., Yakovlev, D.R., Mariette, Henri, Bayer, M., Nanophysique et Semiconducteurs (NPSC), Institut Néel (NEEL), and Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF)
- Subjects
Condensed Matter::Quantum Gases ,[PHYS]Physics [physics] ,Condensed Matter::Other ,Physics::Optics - Abstract
International audience; 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.
- Published
- 2010
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