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Demonstration of a Quick Process to Achieve Buried Heterostructure QCL Leading to High Power and Wall Plug Efficiency
KTH, School of Information and Communication Technology (ICT), Materials- and Nano Physics, Semiconductor Materials, HMA.
KTH, School of Information and Communication Technology (ICT), Materials- and Nano Physics, Semiconductor Materials, HMA. Epiclarus AB, Sweden .
KTH, School of Information and Communication Technology (ICT), Materials- and Nano Physics, Semiconductor Materials, HMA.ORCID iD: 0000-0002-8545-6546
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2014 (English)In: LASER TECHNOLOGY FOR DEFENSE AND SECURITY X, 2014, Vol. 9081, 90810O- p.Conference paper, Published paper (Refereed)
Abstract [en]

Together with the optimal basic design, buried heterostructure quantum cascade laser (BH-QCL) with semi-insulating regrowth offers unique possibility to achieve an effective thermal dissipation and lateral single mode. We demonstrate here for the first time realization of BH-QCLs with a single step regrowth of highly resistive (>1x10(8) ohm.cm) semi-insulating InP:Fe in less than 45 minutes in a flexible hydride vapour phase epitaxy process for burying ridges etched down to 10-15 mu m deep both with and without mask overhang. The fabricated BH-QCLs emitting at similar to 4.7 mu m and similar to 5.5 mu m were characterized. 2 mm long 5.5 mu m lasers with ridge width 17-22 mu m, regrown with mask overhang, exhibited no leakage current. Large width and high doping in the structure did not permit high current density for CW operation. 5 mm long 4.7 mu m BH-QCLs of ridge widths varying from 6-14 mu m regrown without mask overhang, besides being spatially monomode, TM00, exhibited WPE of similar to 8-9% with an output power of 1.5 - 2.5 W at room temperature and under CW operation. Thus, we demonstrate a simple, flexible, quick, stable and single-step regrowth process with extremely good planarization for realizing buried QCLs leading to monomode, high power and high WPE.

Place, publisher, year, edition, pages
2014. Vol. 9081, 90810O- p.
Series
Proceedings of SPIE, ISSN 0277-786X ; 9081
Keyword [en]
Buried heterostructure quantum cascade lasers, high power QCL, High WPE QCL, HVPE regrowth
National Category
Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
URN: urn:nbn:se:kth:diva-154777DOI: 10.1117/12.2053003ISI: 000342289500013Scopus ID: 2-s2.0-84904759280OAI: oai:DiVA.org:kth-154777DiVA: diva2:759589
Conference
Conference on Laser Technology for Defense and Security X, MAY 06-07, 2014, Baltimore, MD, United States
Note

QC 20141030

Available from: 2014-10-30 Created: 2014-10-27 Last updated: 2014-10-30Bibliographically approved

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Sun, Yan-TingLourdudoss, Sebastian

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Metaferia, WondwosenJunesand, CarlSun, Yan-TingLourdudoss, Sebastian
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