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Proceedings Paper

Lead-salt-based VCSELs for the 3- to 6-um range
Author(s): Thomas Schwarzl; Wolfgang Heiss; G. Springholz; M. Aigle; H. Pascher; K. Biermann; Klaus Reimann
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Paper Abstract

Operation of IV-VI vertical-cavity surface-emitting lasers emitting in the mid-infrared is reported. The microcavity laser structures were grown by molecular-beam-epitaxy on BaF2(111) substrates. The stimulated emission is generated in PbTe quantum wells embedded in high finesse Pb0.95Eu0.05Te/EuTe microcavity structures by optically pumping with fs and ns laser pulses. Laser samples were designed for operation at 2 K, at 70 K and at room temperature with emission at 6 mm, 4.8 mm and around 3 mm, respectively. At a wavelength of 3.1 mm, laser operation is obtained up to a temperature of 65°C, limited by nonradiative recombination processes. The temperature dependence of the emission is explained in terms of the strong temperature dependence of the energy band gap of the lead salt compounds as compared to the microcavity resonance energy in agreement with envelope function calculations of the quantum well energy levels.

Paper Details

Date Published: 4 May 2001
PDF: 13 pages
Proc. SPIE 4286, Vertical-Cavity Surface-Emitting Lasers V, (4 May 2001); doi: 10.1117/12.424804
Show Author Affiliations
Thomas Schwarzl, Johannes Kepler Univ. (Austria)
Wolfgang Heiss, Johannes Kepler Univ. (Austria)
G. Springholz, Johannes Kepler Univ. (Austria)
M. Aigle, Univ. Bayreuth (Germany)
H. Pascher, Univ. Bayreuth (Germany)
K. Biermann, Max Born Institut fuer Nichtlineare Optik und Kurzzeitspektroskopie (Germany)
Klaus Reimann, Max Born Institut fuer Nichtlineare Optik und Kurzzeitspektroskopie (Germany)

Published in SPIE Proceedings Vol. 4286:
Vertical-Cavity Surface-Emitting Lasers V
Kent D. Choquette; Chun Lei, Editor(s)

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