Wetting-layer-pumped continuous-wave surface-emitting quantum-dot laser

Keith G. Wilcox, Hani J. Kbashi, Adrian H. Quarterman, Oliver J. Morris, Vasilis Apostolopoulos, Mohamed Henini, Anne C. Tropper

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)


Quantum-dot vertical-external-cavity surface-emitting lasers (QD VECSELs) are of interest due to their large inhomogeneous gain spectrum and the potential for temperature insensitivity and low threshold. We report a QD VECSEL which is wetting-layer-pumped using a 915-nm diode laser, reducing the quantum defect compared to barrier pumping. A slope efficiency of 56% relative to absorbed pump power was measured from an unprocessed sample with a heat-sink temperature of $-$30 $^{\circ} \hbox{C}$, 1.75$\, \times $ higher than when barrier pumped using an 830-nm pump diode.

Original languageEnglish
Article number6045318
Pages (from-to)37-39
Number of pages3
JournalIEEE Photonics Technology Letters
Issue number1
Publication statusPublished - 1 Jan 2012


  • Optically pumped
  • Quantum dot (QD)
  • Semiconductor laser
  • Vertical-external-cavity surface-emitting laser (VECSEL)
  • Wetting layer

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Electrical and Electronic Engineering


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