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Proceedings Paper

High-performance quantum cascade lasers grown by metal-organic vapor phase epitaxy
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Paper Abstract

We report MOVPE-grown quantum cascade lasers with operating wavelengths between λ~7.5-9.5μm with threshold current densities as low as 2.4kA/cm2 at room temperature. Seven wafers grown for operation at ~9μm show a variation of just 3% in the superlattice periods obtained from X-ray analysis, and laser emission is observed from all wafers with a ~5meV spread of emission energies. Multimode Fabry-Perot and singlemode distributed feedback lasers have been fabricated, operating at λ~7.8μm at room temperature, corresponding with absorption lines in the infrared spectra of methane. In addition, we have produced a strain compensated MOVPE-grown quantum cascade laser operating at λ~4.5μm.

Paper Details

Date Published: 22 October 2004
PDF: 8 pages
Proc. SPIE 5564, Infrared Detector Materials and Devices, (22 October 2004); doi: 10.1117/12.558991
Show Author Affiliations
Luke R. Wilson, Univ. of Sheffield (United Kingdom)
Richard P. Green, Univ. of Sheffield (United Kingdom)
Andrey B. Krysa, Univ. of Sheffield (United Kingdom)
John S. Roberts, Univ. of Sheffield (United Kingdom)
Wing H. Ng, Univ. of Sheffield (United Kingdom)
Dmitry G. Revin, Univ. of Sheffield (United Kingdom)
Christian Pflugl, Technische Univ. Wien (Austria)
Werner Schrenk, Technische Univ. Wien (Austria)
Gottfried Strasser, Technische Univ. Wien (Austria)
John W. Cockburn, Univ. of Sheffield (United Kingdom)

Published in SPIE Proceedings Vol. 5564:
Infrared Detector Materials and Devices
Randolph E. Longshore; Sivalingam Sivananthan, Editor(s)

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