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arXiv · 1502.03940

Room Temperature Operation of a Buried Heterostructure Photonic Crystal Quantum Cascade Laser

R. Peretti·V. Liverini·J. M. Wolf·C. Bonzon·M. J. Süess·S. Lourdudoss·W. Metaferia·M. Beck·J. Faist
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Abstract

High power single mode quantum cascade lasers with a narrow far field are important for several applications including surgery or military countermeasure. Existing technologies suffer from drawbacks such as operation temperature and scalability. In this paper we introduce a fabrication approach that potentially solves simultaneously these remaining limitations. We demonstrate and characterize deep etched, buried photonic crystal quantum cascade lasers emitting around a wavelength of 8.5 {\mu}m. The active region was dry etched before being regrown with semi-insulating Fe:InP. This fabrication strategy results in a refractive index contrast of 10% allowing good photonic mode control, and simultaneously provides good thermal extraction during operation. Single mode emission with narrow far field pattern and peak powers up to 0.88 W at 263 K were recorded from the facet of the photonic crystal laser, and lasing operation was maintained up to room temperature. The lasing modes emitted from square photonic crystal mesas with a side length of 550{\mu}m, were identified as slow Bloch photonic crystal modes by means of three-dimensional photonic simulations and measurements.

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R. Peretti, V. Liverini, J. M. Wolf, C. Bonzon, M. J. Süess, S. Lourdudoss, W. Metaferia, M. Beck, J. Faist. 2015-02-13. Room Temperature Operation of a Buried Heterostructure Photonic Crystal Quantum Cascade Laser. https://doi.org/10.1002/lpor.201600047

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