Room-temperature edge and surface-emitting distributed-feedback quantum cascade lasers without top cladding layers

Adel Bousseksou; Jean-René Coudevylle; Gangyi Xu; Raffaele Colombelli; Carlo Sirtori; Grégoire Beaudoin; Isabelle Sagnes

doi:10.1117/12.841831

12 February 2010 Room-temperature edge and surface-emitting distributed-feedback quantum cascade lasers without top cladding layers

Adel Bousseksou, Jean-René Coudevylle, Gangyi Xu, Raffaele Colombelli, Carlo Sirtori, Grégoire Beaudoin, Isabelle Sagnes

Author Affiliations +

Proceedings Volume 7616, Novel In-Plane Semiconductor Lasers IX; 761615 (2010) https://doi.org/10.1117/12.841831
Event: SPIE OPTO, 2010, San Francisco, California, United States

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.

Citation Download Citation

Adel Bousseksou, Jean-René Coudevylle, Gangyi Xu, Raffaele Colombelli, Carlo Sirtori, Grégoire Beaudoin, and Isabelle Sagnes "Room-temperature edge and surface-emitting distributed-feedback quantum cascade lasers without top cladding layers", Proc. SPIE 7616, Novel In-Plane Semiconductor Lasers IX, 761615 (12 February 2010); https://doi.org/10.1117/12.841831

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