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Proceedings Paper

Room-temperature edge and surface-emitting distributed-feedback quantum cascade lasers without top cladding layers
Author(s): Adel Bousseksou; Jean-René Coudevylle; Gangyi Xu; Raffaele Colombelli; Carlo Sirtori; Grégoire Beaudoin; Isabelle Sagnes
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Paper Abstract

We demonstrate surface-emitting distributed-feedback (DFB) quantum cascade (QC) lasers - operating in the midinfrared - with double-slit 2nd order DFB gratings which are implemented via the sole patterning of the top metallic layer, directly at the top of the active region. The small-slit design allows one to reduce the high plasmonic losses which would be induced by a standard 2nd order grating. The devices operate at room temperature, in pulsed mode, and exhibit single mode emission at 7.2 μm wavelength. The device far-field consists of an almost single-lobed emission with a low divergence (<1 degree) in the grating direction. This result shows that sub-wavelength patterning of the top metallization layer of mid-infrared surface-plasmon QC lasers allows one to reduce the losses even for higher-order DFB grating devices.

Paper Details

Date Published: 12 February 2010
PDF: 5 pages
Proc. SPIE 7616, Novel In-Plane Semiconductor Lasers IX, 761615 (12 February 2010); doi: 10.1117/12.841831
Show Author Affiliations
Adel Bousseksou, Institut d'Électronique Fondamentale, CNRS, Univ. Paris-Sud (France)
Jean-René Coudevylle, Institut d'Électronique Fondamentale, CNRS, Univ. Paris-Sud (France)
Gangyi Xu, Institut d'Électronique Fondamentale, CNRS, Univ. Paris-Sud (France)
Raffaele Colombelli, Institut d'Électronique Fondamentale, CNRS, Univ. Paris-Sud (France)
Carlo Sirtori, Lab. MPQ, CNRS, Univ. Paris Diderot (France)
Grégoire Beaudoin, Lab. de Photonique et de Nanostructures, CNRS/LPN (France)
Isabelle Sagnes, Lab. de Photonique et de Nanostructures, CNRS/LPN (France)


Published in SPIE Proceedings Vol. 7616:
Novel In-Plane Semiconductor Lasers IX
Alexey A. Belyanin; Peter M. Smowton, Editor(s)

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