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Room temperature operation of a deep etched buried heterostructure photonic crystal quantum cascade laser
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2016 (English)In: Laser & Photonics reviews, ISSN 1863-8880, E-ISSN 1863-8899, Vol. 10, no 5, p. 843-848Article in journal (Refereed) Published
Abstract [en]

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 μm. 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 550μm, were identified as slow Bloch photonic crystal modes by means of three-dimensional photonic simulations and measurements. (Figure presented.).

Place, publisher, year, edition, pages
Wiley-VCH Verlagsgesellschaft, 2016. Vol. 10, no 5, p. 843-848
Keywords [en]
Mid infrared, photonic crystal, single mode, quantum cascade laser, Laser optics, Military applications, Military electronic countermeasures, Photonic crystals, Refractive index, Semiconductor lasers, Buried heterostructures, Fabrication strategies, Operation temperature, Photonic crystal laser, Room-temperature operation, Simulations and measurements, Single mode, Single mode emission, Quantum cascade lasers
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Physical Sciences
Identifiers
URN: urn:nbn:se:kth:diva-194897DOI: 10.1002/lpor.201600047ISI: 000384675200012Scopus ID: 2-s2.0-84985906096OAI: oai:DiVA.org:kth-194897DiVA, id: diva2:1052925
Note

QC 20161207

Available from: 2016-12-07 Created: 2016-11-01 Last updated: 2017-11-29Bibliographically approved

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Lourdudoss, Sebastian

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