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Article Dans Une Revue Physical Review B: Condensed Matter and Materials Physics (1998-2015) Année : 2008

Ultrafast carrier dynamics in Br+ -bombarded InP studied by time-resolved terahertz spectroscopy

Résumé

Ultrafast dynamics of charge carriers in Br+ -bombarded InP were studied using time-resolved terahertz spectroscopy. Carrier lifetimes and mobilities in various samples prepared with irradiation doses spanning from 109 up to 1012cm-2 were determined. The lifetime of photoexcited carriers appears to be determined primarily by the density of defects resulting from host-atom displacements while it is not significantly influenced by the Br-atom implantation. In the most irradiated sample, a carrier lifetime as short as 300 fs was found. All samples exhibit a high mobility (3000-900cm2V-1s-1) ; the lower values correspond to a smaller irradiation dose. In selected samples, the density of traps along with electron and hole lifetimes was determined.
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Dates et versions

hal-00762666 , version 1 (07-12-2012)

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H. Němec, L. Fekete, F. Kadlec, P. Kužel, M. Martin, et al.. Ultrafast carrier dynamics in Br+ -bombarded InP studied by time-resolved terahertz spectroscopy. Physical Review B: Condensed Matter and Materials Physics (1998-2015), 2008, 78 (23), pp.235206 (1-7). ⟨10.1103/PHYSREVB.78.235206⟩. ⟨hal-00762666⟩
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