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

Delmas, M.; Höglund, Linda; Ivanov, Ruslan; Ramos, David; Žurauskaitė, L.; Becanovic, Smilja; Almqvist, Susanne; Evans, Dean; Tinghag, Pia; Rihtnesberg, David; Fattala, Saad; Smuk, Anton; Smuk, Sergiy; Costard, E.

doi:10.1117/12.2618752

Cited by 6 publications

(4 citation statements)

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“…The turn-on bias (defined by reaching 90% of the QE's plateau value) is ~ -150 mV at 80 K and decreases with temperature (-100 mV for detector temperatures > 120 K). The results are very similar to what we have previously obtained on Oden MW, 15 µm pixel pitch detectors [3]. This electro-optical performance is on the state-of-the-art level and demonstrate the potential for seamless transition at IRnova from the currently employed for T2SL arrays VGA format to HD compatible with HOT operation.…”

Section: Development Of Hot Hd T2sl -Njord Mw 31 Performance Of Small...supporting

confidence: 87%

“…This provides a fast and efficient way of evaluating the MTF. Direct imaging on the array requires no lens correction of the MTF and it prevents the degradation associated with vibration of the system [3]. Furthermore, as a reduced number of pixels is required to evaluate the MTF with this method, evaluation of the uniformity of the MTF across an FPA is enabled.…”

Section: Modulation Transfer Functionmentioning

confidence: 99%

“…IRnova demonstrated its first SWaP detector in 2019 [1] and one year later, IRnova announced the serial production of Oden MW, a reduced SWaP integrated detector dewar cooler assembly with detector weights as low as 230 g, with cooler power consumption reduced to 1.8 W, which is 50 % lower compared to regular detectors [2]. In 2022, a significant upgrade of the Oden MW detector was released with operating temperatures up to 150 K with maintained high performance [3]. In this paper, more detailed studies of the uniformity, random telegraph signal (RTS) and modular transfer function (MTF) in the Oden MW T2SL detectors are presented.…”

Section: Introductionmentioning

confidence: 99%

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

Delmas

Ivanov

Ramos

et al. 2023

Infrared Technology and Applications XLIX

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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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Section: Development Of Hot Hd T2sl -Njord Mw 31 Performance Of Small...supporting

confidence: 87%

Section: Modulation Transfer Functionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

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

Delmas

Ivanov

Ramos

et al. 2023

Infrared Technology and Applications XLIX

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show abstract

“…As an important alternative to HgCdTe infrared detectors, T2SLs are widely used in military and civilian infrared imaging fields. In recent years, researchers have begun to study and explore the possibility of improving T2SLs in terms of high responsivity [ 2 , 3 ], high operating temperature [ [4] , [5] , [6] , [7] ], etc. T2SLs have special electronic band structures, which is tunable and makes the corresponding cut-off wavelength within the wavelength range of 3–32 μm [ 8 ].…”

Section: Introductionmentioning

confidence: 99%