Type-II superlattice detectors for high-performance SWaP detectors and HOT HD applications at IRnova

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

doi:10.1117/12.2663854

13 June 2023 Type-II superlattice detectors for high-performance SWaP detectors and HOT HD applications at IRnova

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

Author Affiliations +

Proceedings Volume 12534, Infrared Technology and Applications XLIX; 125340H (2023) https://doi.org/10.1117/12.2663854
Event: SPIE Defense + Commercial Sensing, 2023, Orlando, Florida, United States

Abstract

In this paper, the main parameters contributing to the high-imaging quality of IRnova’s Type-II superlattice (T2SL) detectors are studied: the sensitivity, uniformity, modulation transfer function (MTF) and random telegraph signal (RTS). High-sensitivity and good uniformity across the detectors are displayed by their low-noise equivalent temperature difference (NETD) with average values of 22 mK (@ F/5.5, 125 K) and very narrow histograms. MTF values very close to the ideal ones have been demonstrated for Oden MW detectors, reaching 0.6 at the Nyquist frequency, along with a single-digit number of flickering pixels. Furthermore, thanks to the optimization of design and fabrication processes of Oden MW detectors, diffusion-limited dark current densities have been reached that are independent of the perimeter/area ratio for the pitch sizes down to 10 μm. Leveraging this achievement is the upcoming Njord MW HD detector (1280×1024 pixels, 10 μm pitch), for which the bias- and temperature-dependence have been assessed using IRnova’s in-house simulations tools. NETD values lower than 25 mK are shown for temperatures up to 140 K. The simulations were based on measured bias- and temperature- dependencies of the detectors on 10 μm pitch, combined with parameters of the dedicated 1280×1024 ROIC on 10 μm pitch design.

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M. Delmas, R. Ivanov, D. Ramos, L. Žurauskaitė, D. Evans, D. Rihtnesberg, L. Bendrot, S. Smuk, A. Smuk, S. Becanovic, S. Almqvist, P. Tinghag, S. Fattala, E. Costard, and L. Höglund "Type-II superlattice detectors for high-performance SWaP detectors and HOT HD applications at IRnova", Proc. SPIE 12534, Infrared Technology and Applications XLIX, 125340H (13 June 2023); https://doi.org/10.1117/12.2663854

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