Room temperature, continuous wave lasing in microcylinder and microring quantum dot laser diodes

M. Munsch*, J. Claudon, N. S. Malik, K. Gilbert, P. Grosse, J. -M. Gerard, F. Albert, F. Langer, T. Schlereth, M. M. Pieczarka, Sven Höfling, M. Kamp, A. Forchel, S. Reitzenstein

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

56 Citations (Scopus)

Abstract

We demonstrate room temperature, continuous wave lasing of laser diodes based on AlGaAs whispering gallery mode (WGM) resonators (microcylinder and microring) embedding a quantum dot (QD) active layer. Using InGaAlAs QDs, high-Q (>60 000) lasing modes are observed around 910 nm, up to 50 degrees C. Lasing with similar performance is obtained around 1230 nm, using InAs QDs. Furthermore, we show that the current injection in the active part of the device is improved in ring resonators, leading to threshold currents of approximately 4 mA for a device with 80 mu m diameter. This geometry also suppresses WGMs with a high radial order, thus simplifying the lasing spectra. In these conditions, stable single-mode and two-color lasing can be obtained. (C) 2012 American Institute of Physics. [doi:10.1063/1.3678031]

Original languageEnglish
Article number031111
Number of pages4
JournalApplied Physics Letters
Volume100
Issue number3
DOIs
Publication statusPublished - 16 Jan 2012

Keywords

  • WHISPERING-GALLERY MODES
  • MICRODISK LASERS
  • THRESHOLD CURRENT
  • OPTICAL LOSS
  • EMISSION
  • MICROCAVITIES
  • OPERATION
  • SILICON
  • DESIGN

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