HOT SWaP and HD detectors based on Type-II superlattices at IRnova

M. Delmas; L. Höglund; R. Ivanov; D. Ramos; L. Zurauskaite; S. Becanovic; S. Almqvist; D. Evans; P. Tinghag; D. Rihtnesberg; S. Fattala; A. Smuk; S. Smuk; E. Costard

doi:10.1117/12.2618752

27 May 2022 HOT SWaP and HD detectors based on Type-II superlattices at IRnova

M. Delmas, L. Höglund, R. Ivanov, D. Ramos, L. Zurauskaite, S. Becanovic, S. Almqvist, D. Evans, P. Tinghag, D. Rihtnesberg, S. Fattala, A. Smuk, S. Smuk, E. Costard

Author Affiliations +

Proceedings Volume 12107, Infrared Technology and Applications XLVIII; 121070R (2022) https://doi.org/10.1117/12.2618752
Event: SPIE Defense + Commercial Sensing, 2022, Orlando, Florida, United States

Abstract

In 2019, IRnova announced the serial production of Oden MW, a reduced SWaP (Size, Weight and Power) integrated detector dewar cooler assembly. Oden MW relies on HOT T2SL array (640 × 512, 15 μm pitch) with full MWIR spectral band coverage (3-5 µm) without compromises on electro-optical performances. Ever since, IRnova maintained significant research efforts to further reduce the SWaP footprint, focusing on increased focal plane operating temperature above 110 K, targeting lower demand for cryocooling power thus further reducing overall power consumption. This has now resulted in small pitch T2SL detector arrays with diffusion limited dark current density, which is approaching the Rule07 with a level of around 6.5 × 10^-6 A/cm² at 150 K and a box quantum efficiency (3-5 μm) as high as 67 %. Excellent performance is demonstrated for 640 × 512, 15 μm pitch FPAs with average temporal NETD and spatial NETD values of 21 mK and 6 mK, respectively, when measured with F/5.5 aperture and 60 Hz frame rate at 140 K. These NETD values are insensitive to the temperature in the 80 K – 140 K range. High uniformity and excellent operability (~ 99.84 %) were also obtained at 140 K. In addition, arrays with 10 μm pitch were fabricated which showed similar dark current values, clearly demonstrating material maturity for the short coming small pitch HD HOT T2SL detectors at IRnova.

Conference Presentation

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M. Delmas, L. Höglund, R. Ivanov, D. Ramos, L. Zurauskaite, S. Becanovic, S. Almqvist, D. Evans, P. Tinghag, D. Rihtnesberg, S. Fattala, A. Smuk, S. Smuk, and E. Costard "HOT SWaP and HD detectors based on Type-II superlattices at IRnova", Proc. SPIE 12107, Infrared Technology and Applications XLVIII, 121070R (27 May 2022); https://doi.org/10.1117/12.2618752

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