High beta lasing in micropillar cavities with adiabatic layer design

M. Lermer*, N. Gregersen, M. Lorke, E. Schild, P. Gold, J. Mork, C. Schneider, A. Forchel, S. Reitzenstein, Sven Höfling, M. Kamp

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

18 Citations (Scopus)


We report on lasing in optically pumped adiabatic micropillar cavities, based on the AlAs/GaAs material system. A detailed study of the threshold pump power and the spontaneous emission beta factor in the lasing regime for different diameters d(c) is presented. We demonstrate a reduction of the threshold pump power by over 2 orders of magnitude from d(c) = 2.25 mu m down to 0.95 mu m. Lasing with beta factors exceeding 0.5 shows that adiabatic micropillars are operating deeply in the cavity quantum electrodynamics regime.

Original languageEnglish
Article number052114
Number of pages4
JournalApplied Physics Letters
Issue number5
Publication statusPublished - 4 Feb 2013


  • Sngle-photon source
  • Quantum-dot gain
  • Spontaneous emission
  • Pillar microcavities
  • Lasers


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