InGaAs-based SWIR photodetectors for night vision and gated viewing

Rutz, Frank; Aidam, R.; Bächle, Andreas; Heussen, H.; Bronner, W.; Rehm, Robert; Benecke, M.; Sieck, A.; Brünner, Stefan; Göhler, Benjamin; Lutzmann, Peter

doi:10.1117/12.2325665

Cited by 8 publications

(5 citation statements)

References 1 publication

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“…Additionally, sensors utilizing avalanche effects, like EBAPS [14] and SPAD [15], have advancements in performance. Recently, susceptible SWIR sensors with excellent dehazing capabilities, particularly for phenomena like smoke, are gaining prominence [13], [16].…”

Section: Infrared Sensor For Night Visionmentioning

confidence: 99%

Automatic Annotation Method for Day-Night Aerial Infrared Image Dataset Creation and Its Application to Semantic Segmentation

Kibe,

Inoue,

Morioka

et al. 2024

Preprint

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Section: Infrared Sensor For Night Visionmentioning

confidence: 99%

Automatic Annotation Method for Day-Night Aerial Infrared Image Dataset Creation and Its Application to Semantic Segmentation

Kibe,

Inoue,

Morioka

et al. 2024

Preprint

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“…Broadband photodetectors (PDs) with the ability to sense a broad spectral range and realize multispectral images could vastly simplify the systems and provide rich information, such as visible to MWIR fused images combining the appearance of visible light, texture composition of SWIR, and thermal detection of MWIR. However, the detectable spectral ranges of photodetectors are still in discrete bands, like ultraviolet-VIS, NIR, SWIR, and MWIR, limited by using bulk semiconductors like silicon (0.4 ~ 0.9 µm) 12,13 , InGaAs (0.9 ~ 1.7 µm) 14,15 , InSb or HgCdTe (3 ~ 5 µm) 16,17 .…”

Section: Full Textmentioning

confidence: 99%

Ultrabroadband Visible to Mid-wave Infrared PbS/HgTe Colloidal Quantum Dot Imagers

Tang,

Tan,

et al. 2023

Preprint

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Photodetection over a broad spectral range is invaluable for multispectral sensing and imaging. Despite that single-element detectors with high performance and wide spectral detection ranges have been achieved with various low-dimension materials, broadband focal plane array imagers have been rarely reported. Here, we propose a stacked PbS/HgTe colloidal quantum dot photodetector configuration with graded energy gaps, which leads to an ultrabroadband spectral response from visible to mid-wave infrared (MWIR) with excellent sensitivity and detection performance. More importantly, an ultrabroadband focal plane array imager with a resolution of 640 × 512 has been fabricated and the results show low photoresponse non-uniformity (PRNU) down to 6%. The noise equivalent temperature difference (NETD) of the broadband imager is as low as 34 mK, and high-resolution thermal images have been demonstrated. With a set of optical filters, red, green, blue, short-wave infrared, MWIR, and multispectral merged images have been captured.

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“…During the epitaxy development, it turned out that the doping concentration [19] and thickness [20] of the InAlAs charge layer and its neighboring InAlGaAs grading layer play a crucial role in the I-V characteristics of the APD. Within several iteration loops of epitaxy, test structure device processing, and electro-optical characterization, we managed to reduce the breakdown voltage of the InGaAs/InAlAs APDs from 47 V [18] to 31 V, 23 V [21], and finally 19 V [22].…”

Section: Bereitgestellt Von | Provisional Accountmentioning

confidence: 99%

InGaAs APD matrix sensors for SWIR gated viewing

Rutz

Aidam

Heussen

et al. 2019

Advanced Optical Technologies

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Short-wavelength infrared (SWIR) detection systems are increasingly in demand for surveillance, reconnaissance, and remote sensing applications. Eye-safe SWIR lasers can be utilized for active imaging systems with high image contrast and long detection range. The gated-viewing (GV) technique using short-pulse lasers and fast-gated cameras in the nanosecond range enables utilizing the distance information in addition to the signal intensity of the acquired images. The InGaAs material system is very well suited for the fabrication of high-performance SWIR photodetectors providing a typical cutoff wavelength of 1.7 μm, which covers the emission lines of available laser sources at typical telecom wavelengths around 1.55 μm. However, the usually short integration times needed for GV leads to very small photosignals. We report on the development of SWIR avalanche photodetector (APD) arrays with 640 × 512 pixels and 15 μm pixel pitch based on the InGaAs material system. The InGaAs-APD focal plane arrays have been successfully integrated into SWIR cameras which yield gain values of M ≈ 10 on camera level at a reverse bias voltage around 21 V and are the first InGaAs-based SWIR cameras worldwide providing a 640 × 512 image format and utilizing avalanche gain for signal amplification. The camera performance is demonstrated by SWIR laser GV sample images.

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InGaAs-based SWIR photodetectors for night vision and gated viewing

Cited by 8 publications

References 1 publication

Automatic Annotation Method for Day-Night Aerial Infrared Image Dataset Creation and Its Application to Semantic Segmentation

Automatic Annotation Method for Day-Night Aerial Infrared Image Dataset Creation and Its Application to Semantic Segmentation

Ultrabroadband Visible to Mid-wave Infrared PbS/HgTe Colloidal Quantum Dot Imagers

InGaAs APD matrix sensors for SWIR gated viewing

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