Ultrafast dynamics of InAs/GaAs quantum-dot microdisk lasers

K. J. Luo, J. Y. Xu, H. Cao, Y. Ma, S. H. Chang, S. T. Ho, G. S. Solomon

Research output: Contribution to journalArticlepeer-review

34 Citations (Scopus)

Abstract

The dynamical response of InAs/GaAs quantum-dot microdisk lasers has been experimentally investigated using femtosecond optical pumping. Because surface recombination and carrier diffusion are suppressed in the quantum dots, the response speed of a quantum-dot microdisk laser is much faster than that of a quantum-well microdisk laser. A turn-on time as short as 7.8 ps has been achieved in a quantum-dot microdisk laser at 5 K. The temperature dependence of the dynamical response of the quantum-dot microdisk lasers has also been studied over a wide temperature range. At the same pumping level, the turn-on time of the laser decreases as the temperature increases from 5 to 120 K. Such behavior may be due to a faster carrier relaxation process at higher temperature.

Original languageEnglish
Pages (from-to)3397-3399
Number of pages3
JournalApplied Physics Letters
Volume78
Issue number22
DOIs
Publication statusPublished - 2001 May 28

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)

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