Low threshold electrically pumped quantum dot-micropillar lasers

S. Reitzenstein*, T. Heindel, C. Kistner, A. Rahimi-Iman, C. Schneider, Sven Höfling, A. Forchel

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

86 Citations (Scopus)

Abstract

We report on low threshold lasing in electrically pumped quantum dot-micropillar cavities. Lasing action associated with threshold currents as low as 8 mu A at 10 K is observed for micropillar cavities with quality factors exceeding 10.000. Due to an optimized contact scheme lasing is achieved for pillar structures with diameters as small as 1.5 mu m, containing on average less than 100 quantum dots in the active layer. The transition from spontaneous to stimulated emission is confirmed by autocorrelation measurements which reveal pronounced photon bunching near threshold. (C) 2008 American Institute of Physics.

Original languageEnglish
Article number061104
Number of pages3
JournalApplied Physics Letters
Volume93
Issue number6
DOIs
Publication statusPublished - 11 Aug 2008

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