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Proceedings Paper

High-performance MWIR type-II superlattice detectors
Author(s): Henk Martijn; Carl Asplund; Rickard Marcks von Würtemberg; Hedda Malm
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Paper Abstract

A VGA format type-II superlattice focal plane array (FPA) for the mid-wave infrared (MWIR) atmospheric window has been designed, manufactured and characterized. The detector material is based on a heterojunction structure with a barrier that effectively decreases the Shockley-Read-Hall based component of the dark current. A very effective passivation method has been used which successfully inhibits all surface leakage currents. The barrier structure has a 50 % cutoff at 5 µm and 65 % quantum efficiency without antireflective coating. The dark current density is 3×10-6 A/cm2 at -0.05 V bias and 120 K. The optical cavity of the detector has been optimized for maximum capture of available light in the MWIR window. A focal plane array with 640 by 512 pixels and 15 µm pitch was processed based on this barrier structure. High-quality imagery in a system with high F-number will be presented.

Paper Details

Date Published: 11 June 2013
PDF: 9 pages
Proc. SPIE 8704, Infrared Technology and Applications XXXIX, 87040Z (11 June 2013); doi: 10.1117/12.2016602
Show Author Affiliations
Henk Martijn, IRnova AB (Sweden)
Carl Asplund, IRnova AB (Sweden)
Rickard Marcks von Würtemberg, IRnova AB (Sweden)
Hedda Malm, IRnova AB (Sweden)

Published in SPIE Proceedings Vol. 8704:
Infrared Technology and Applications XXXIX
Bjørn F. Andresen; Gabor F. Fulop; Charles M. Hanson; Paul R. Norton; Patrick Robert, Editor(s)

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