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Article Dans Une Revue Physical Review B: Condensed Matter and Materials Physics (1998-2015) Année : 2011

Delay and distortion of slow light pulses by excitons in ZnO

Résumé

Distortion of light pulses in ZnO caused by both bound and free excitons is demonstrated by time-of-flight spectroscopy. Numerous lines of bound excitons dissect the pulse spectrum and induce slowdown of light propagation around the dips. Exciton-polariton resonances determine the overall pulse delay, which approaches 1.6 ns at 3.374 eV for a 0.3 mm propagation length, as well as the pulse curvature in the time-energy plane and its attenuation. Analysis of cw and time-resolved data yields the excitonic parameters inherent for bulk ZnO. A discrepancy is found between these bulk parameters and those given by surface-probing techniques.
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Dates et versions

hal-00633626 , version 1 (19-10-2011)

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T. V. Shubina, M.M. Glasov, Nikolay A. Gippius, A.A. Toropov, David Lagarde, et al.. Delay and distortion of slow light pulses by excitons in ZnO. Physical Review B: Condensed Matter and Materials Physics (1998-2015), 2011, 84, pp.075202. ⟨10.1103/PhysRevB.84.075202⟩. ⟨hal-00633626⟩
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