Ultrafast switch-off of an electrically pumped quantum-dot laser

A. V. Platonov, C. Lingk, J. Feldmann, M. Arzberger, G. Böhm, M. C. Amann, G. Abstreiter

Research output: Contribution to journalArticlepeer-review

13 Scopus citations

Abstract

We report on the subpicosecond switch-off of the emission of an electrically pumped quantum-dot (QD) laser with perturbation by a 100 fs optical pulse. The observed effect is in contrast to known ones for quantum-well laser diodes. This is explained by unique properties of the QDs, namely by the fast modal gain saturation and localization-enhanced intraband absorption. The QD laser response can be described in terms of hot carrier absorption in the barrier states via intraband optical transitions leading to the transient suppression of the laser mode and, hence, to the switch-off.

Original languageEnglish
Pages (from-to)1177-1179
Number of pages3
JournalApplied Physics Letters
Volume81
Issue number7
DOIs
StatePublished - 12 Aug 2002

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