Ultrafast switch-off of an electrically pumped quantum-dot laser
- 12 August 2002
- journal article
- research article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 81 (7) , 1177-1179
- https://doi.org/10.1063/1.1500431
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.Keywords
This publication has 16 references indexed in Scilit:
- Dark pulse formation in a quantum-dot laserApplied Physics Letters, 2001
- Time-resolved four-wave mixing in InAs/InGaAs quantum-dot amplifiers under electrical injectionApplied Physics Letters, 2000
- Observation of dark-pulse formation in gain-clamped semiconductor optical amplifiers by cross-gain modulationApplied Physics Letters, 1999
- The present status of quantum dot lasersPhysica E: Low-dimensional Systems and Nanostructures, 1999
- Influence of growth conditions on the photoluminescence of self-assembled InAs/GaAs quantum dotsJournal of Applied Physics, 1999
- Emission spectra and mode structure of InAs/GaAs self-organized quantum dot lasersApplied Physics Letters, 1998
- Femtosecond dynamics in semiconductor lasers: Dark pulse formationApplied Physics Letters, 1998
- Small-signal modulation and differential gain of single-mode self-organized In0.4Ga0.6As/GaAs quantum dot lasersApplied Physics Letters, 1997
- Ultrafast switch-off of a vertical-cavity semiconductor laserPhysical Review B, 1997
- Picosecond spectroscopy of optically modulated high-speed laser diodesApplied Physics Letters, 1995