Towards ultra-small pixel pitch cooled MW and LW IR-modules

Lutz, H.; Breiter, Rainer; Eich, D.; Figgemeier, H.; Hanna, S.; Oelmaier, Reinhard; Wendler, J.

doi:10.1117/12.2304842

Cited by 7 publications

(14 citation statements)

References 3 publications

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“…An SXGA-format (1280 x 1024) has been chosen to allow for higher spatial resolution, but at the same time to use field-proven dewar-cooler configurations of their 640x512, 15µm pitch pendants with nearly identical detector area. The first prototype of a compact MWIR module with a pixel count of ~1.3 Mega-Pixels in 7.5µm pitch has successfully been demonstrated in 2022 6 . It was realized in a diffraction limited configuration using an F/3 cold shield.…”

Section: Sxga-format Mwir Modules With 75µm Pixel Pitchmentioning

confidence: 99%

“…It was realized in a diffraction limited configuration using an F/3 cold shield. The architecture of the demonstrator was completed using a low-power, dewar-mounted electronics with eight video channels ('CCE8K-LP') and the AIM in-house slim dual-piston cooler 'SX035' operated by the miniature digital cooler electronics 'µDCE050-2' 6,10 . Promising first performance data were obtained with a thermal resolution of 31.8mK and high operability of above 99.8% at an operating temperature of 120K 6 .…”

Section: Sxga-format Mwir Modules With 75µm Pixel Pitchmentioning

confidence: 99%

“…The architecture of the demonstrator was completed using a low-power, dewar-mounted electronics with eight video channels ('CCE8K-LP') and the AIM in-house slim dual-piston cooler 'SX035' operated by the miniature digital cooler electronics 'µDCE050-2' 6,10 . Promising first performance data were obtained with a thermal resolution of 31.8mK and high operability of above 99.8% at an operating temperature of 120K 6 . In the meantime, e/o characterization has been continued and performance has been improved to allow for even higher operating temperatures.…”

Section: Sxga-format Mwir Modules With 75µm Pixel Pitchmentioning

confidence: 99%

“…This strategy was successfully practiced for 384x288, 24µm pitch followed by 640x512, 15µm pitch MWIR modules and then advanced to 1024x768, 10µm pitch MWIR modules 1 . In the course of pitch size reduction, a 5µm pixel is intensively pursued by several detector manufacturers as the ultimate goal for MWIR FPAs 2,3,4,5,6 . During this endeavor, a 7.5µm pixel pitch has been realized at AIM as next step in miniaturization using an SXGA-format (1280x1024) 6 .…”

Section: Introductionmentioning

confidence: 99%

“…In the course of pitch size reduction, a 5µm pixel is intensively pursued by several detector manufacturers as the ultimate goal for MWIR FPAs 2,3,4,5,6 . During this endeavor, a 7.5µm pixel pitch has been realized at AIM as next step in miniaturization using an SXGA-format (1280x1024) 6 . An alternative approach focuses on the combination of low SWaP characteristics with cost-efficiency (SWaP-C).…”

Section: Introductionmentioning

confidence: 99%

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Low SWaP MWIR and LWIR modules with small pixel pitch

Lutz

Breiter

Eich

et al. 2023

Infrared Technology and Applications XLIX

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Pixel pitch reduction as well as high operating temperatures (HOT) of IR focal plane arrays (FPA) have attracted huge development effort in recent years. While the development journey is continuously moving towards an ultra-small pixel pitch of ~5µm for MWIR FPAs by several manufacturers, for their LWIR pendants the focus has not been on pitch size reduction and HOT so far. This comes as a surprise, since low SWaP (size, weight and power) LWIR modules in combination with high spatial resolution are of great interest due to their superior electro-optical (e/o) performance in particular for scenarios with degraded visual environment. An SXGA-format (1280x1024 pixels) MWIR module using a 7.5µm pixel pitch is currently under development at AIM. Excellent performance data were obtained with the first prototypes up to elevated operating temperatures of ~150K thanks to the AIM HOT MCT p/n detector technology. SWaP characteristics are analyzed for both a compact configuration using the in-house 'SX035' cooler and for an even smaller variant referred to as 'HOT Cube SX'. Moreover, a low SWaP VGA-format MWIR module is under development at AIM using a 10µm pixel and a HOT rotary cooler. First measurement results will be shown.Promising first e/o data of XGA-format 10µm pitch LWIR FPAs manufactured in a planar MCT p/n technology have already been presented by AIM last year. Recently, the performance has been improved which is underlined by a high thermal resolution of ~30mk and a low level of noisy pixel at HOT of ~100K. Latest results as well as key features of the possible low SWaP IR-module configurations will be discussed.

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Section: Sxga-format Mwir Modules With 75µm Pixel Pitchmentioning

confidence: 99%

Section: Sxga-format Mwir Modules With 75µm Pixel Pitchmentioning

confidence: 99%

Section: Sxga-format Mwir Modules With 75µm Pixel Pitchmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Low SWaP MWIR and LWIR modules with small pixel pitch

Lutz

Breiter

Eich

et al. 2023

Infrared Technology and Applications XLIX

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Electrically Modulated Single/Multicolor High Responsivity 2D MoTe₂/MoS₂ Photodetector for Broadband Detection

et al. 2023

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A multicolor imaging system can enhance the detection and identification distance of a target object by comparing images measured with distinguishable wavelength bands. To achieve high performance of multicolor detection, high responsivity within ultra-broadband is essentially required for increasing the resolution of the photodetector. In this study, we developed single/ multicolor detection with high responsivity within ultra-broadband by a two-dimensional van der Waals MoTe 2 /MoS 2 heterostructure. Owing to interlayer transition at the type-II staggered heterojunction, the proposed device can perform photodetection from visible-to-infrared wavelengths (400−1480 nm) exhibiting high responsivities of 9.74, 2.65, and 0.416 A/W under illumination at wavelengths of 520, 980, and 1310 nm, respectively, with a fast photoresponse time of 42 μs, under reverse bias voltage. At 802 nm (visible region), 1143 nm (NIR region), and 1485 nm (IR region), three unique cutoff wavelengths clearly appeared, and multicolor imaging at room temperature was possible by matching images measured with three different wavelength bands. The multicolor image could be converted to a single-color image without the use of optical filters by applying a forward bias voltage. Our proposed MoTe 2 /MoS 2 heterostructure enabling electrically modulated single/multicolor imaging can contribute to the practical applications of high-resolution photodetectors.

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Scaling infrared detectors—status and outlook

Rogalski

2022

Rep. Prog. Phys.

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The predicted “Law 19” benchmark for HgCdTe photodiode performance established in 2019 is a milestone in the development of infrared detectors and make the dream of Elliott and colleagues, who in 1999 wrote that there is no fundamental obstacle to obtaining room temperature operation of photon detectors at room temperature with background-limited performance even in reduced fields of view [C.T. Elliott et al., Appl. Phys. Lett. 74(9), 2881 (1999)]. This circumstance will make it possible to achieve in the near future the room-temperature infrared (IR) arrays operation with high pixel density (small pixels) fully compatible with the background and diffraction-limited performance resulting from the system optics. The advent of smaller pixels also results in superior spatial and temperature resolutions of imaging systems. In megapixel imaging systems, the pixel dimension plays a crucial role in determining critical system attributes such as system size, weight, and power consumption (SWaP). In the paper, the physical limitations of pixel size related to the aperture of the optics, which in turn is wavelength dependent, are described. Since the critical parameter of small pixels is quantum efficiency, more attention has been paid to enhancing the coupling of radiation to the detector. Then, the evaluation for assessing the figure-of-merit of different material systems (especially short wavelength IR colloidal quantum dots, both medium and long wavelength IR novel III-V material systems) relative to bulk HgCdTe alloys is considered. Of the various thermal detectors, particular attention has been focused on bolometer arrays due to their largest share of the global commercial market. Also key challenges in realizing ultimate pixel dimensions in focal plane arrays (FPAs) design are presented for different material systems including dark current, pixel hybridization, pixel delineation, and unit cell readout capacity.

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Towards ultra-small pixel pitch cooled MW and LW IR-modules

Cited by 7 publications

References 3 publications

Low SWaP MWIR and LWIR modules with small pixel pitch

Low SWaP MWIR and LWIR modules with small pixel pitch

Electrically Modulated Single/Multicolor High Responsivity 2D MoTe₂/MoS₂ Photodetector for Broadband Detection

Scaling infrared detectors—status and outlook

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Towards ultra-small pixel pitch cooled MW and LW IR-modules

Cited by 7 publications

References 3 publications

Low SWaP MWIR and LWIR modules with small pixel pitch

Low SWaP MWIR and LWIR modules with small pixel pitch

Electrically Modulated Single/Multicolor High Responsivity 2D MoTe2/MoS2 Photodetector for Broadband Detection

Scaling infrared detectors—status and outlook

Contact Info

Product

Resources

About

Electrically Modulated Single/Multicolor High Responsivity 2D MoTe₂/MoS₂ Photodetector for Broadband Detection