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Development of IR imaging at IRnova
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2009 (English)In: Infrared Technology and Applications XXXV, 2009, Vol. 7298Conference paper (Refereed)
Abstract [en]

Historically IRnova has exclusively been a company, focused on manufacturing of QWIP detectors. Nowadays, besides continuous improvements of the performance of QWIP FPAs and development of new formats IRnova is involved in development of QWIP detectors for special applications and has started the development of the next generation infrared detectors, as well. In the light of the development of new formats we validate experimentally theoretical calculations of the response of QWIPs for smaller pixel size. These results allow for the development of high performance megapixel QWIP FPA that exhibit the high uniformity and operability QWIP detectors are known for. QWIP is also being considered for space applications. The requirements on dark current and operating temperature are however much more stringent as compared to the terrestrial applications. We show ways to improve the material quality with as a result a higher detector operating temperature. IRnova is also looking at antimony-based strained superlattice material for the LWIR region together with partners at theIMAGIC centre of excellence. One of the ways to overcome the problem with surface currents is passivating overgrowth. We will report the status and results of overgrowing the detector mesas with AlGa(As)Sb in a MOVPE system. At the same centre of excellence a novel material concept is being developed for LWIR detection. This new material contains a superlattice of vertically aligned and electronically coupled InAs and GaSb quantum dots. Simulations show that it should be possible to have LWIR detection in this material. We will present the current status and report results in this research.

Place, publisher, year, edition, pages
2009. Vol. 7298
, Proceedings of SPIE - The International Society for Optical Engineering, ISSN 0277786X ; 7298
Keyword [en]
Dark current, Infrared detectors, LWIR, MOVPE, MWIR, Quantum well, QWIP, Type II superlattice, Antimony, Gallium alloys, Indium arsenide, Infrared radiation, Materials, Research laboratories, Semiconductor quantum dots, Semiconductor quantum wells, Space applications, Superlattices, Temperature, Detectors
National Category
Condensed Matter Physics
URN: urn:nbn:se:kth:diva-82992DOI: 10.1117/12.820162ScopusID: 2-s2.0-69949166275OAI: diva2:503131
Infrared Technology and Applications XXXV. Orlando, FL. 13 April 2009 - 17 April 2009
QC 20120313Available from: 2012-02-15 Created: 2012-02-12 Last updated: 2012-03-13Bibliographically approved

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Gustafsson, OscarHammar, MattiasHellström, Staffan
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