Delay and distortion of slow light pulses by excitons in ZnO

T. V. Shubina, M. M. Glazov, N. A. Gippius, A. A. Toropov, D. Lagarde, P. Disseix, J. Leymarie, B. Gil, G. Pozina, J. P. Bergman, B. Monemar

Research output: Contribution to journalArticlepeer-review

16 Citations (Scopus)

Abstract

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.

Original languageEnglish
Article number075202
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume84
Issue number7
DOIs
Publication statusPublished - 1 Aug 2011
Externally publishedYes

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