ARIEL early engineering model H1RG IR detector: test bench description and first characterization results

Pichon, Thibault; Schwartz, Victor E.; Gougeon, Audrey; Cara, C.; Cartier, Margaux; Marignac, Jérome; Moreau, Vincent; Mulet, P.; Lortholary, M.; Provost, Léna; Tellier, Olivier; Visticot, François

doi:10.1117/12.2630239

Cited by 4 publications

(3 citation statements)

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“…The detector is operated in unbuffered mode at ESA. A description of the test bench at CEA, and first characterization results can be found here Pichon et al (2022). A brief description of the ESA test bench can be found in Crouzet et al (2020).…”

Section: Resultsmentioning

confidence: 99%

“…During the first characterization campaign performed on an 8

\mu

m cutoff detector, the dark current measured in window mode was surprisingly orders of magnitude higher than the dark current measured while operating the detector in full frame mode Pichon et al (2022). This dark current dependence with the window size is associated with light emission coming from the ReadOut Integrated Circuit (ROIC), as previously identified by Regan and Bergeron (2020) and Ives et al (2020).…”

Section: Introductionmentioning

confidence: 84%

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Pixel source follower glow in HxRG detector

Pichon

Boucher

2023

Astron Nachr

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The Atmospheric Remote‐Sensing Infrared Exoplanet Large‐survey (ARIEL) space mission is dedicated to the study of the exoplanets' atmosphere. To do so, the payload module is made of two instruments. The ARIEL InfraRed Spectrometer instruments is one them, it will perform spectroscopic measurements from the near‐infrared domain to the long‐wave infrared domain. The instrument relies on the use of two H1RG detectors. During early phases of instrument development dark current measurements have been done on an 8 m cutoff detector operated in window mode. These measurements revealed an unexpected level of dark current. This observation triggered a joint series of tests at the European Space Agency technical center and at the Astrophysics Department of the Atomic Energy Commission. As demonstrated in this paper, the excess of dark current originates from the collection, by the photosenstive layer, of light emitted by the source follower transistor of the pixel unit cell. This effect is referred as glow. Based on experimental results, this glow is studied as a function of the detector operating conditions (temperature, biases, timing diagram). These results also show that for the range of operating temperatures considered, the dark current performance of the detector is limited by the glow.

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Section: Resultsmentioning

confidence: 99%

“…During the first characterization campaign performed on an 8

\mu

Section: Introductionmentioning

confidence: 84%

Pixel source follower glow in HxRG detector

Pichon

Boucher

2023

Astron Nachr

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“…A detailed description of the AIRS detectors is published in another paper of this proceeding [10]. For the sake of consistency, a brief description is presented below.…”

Section: Ch1 Detector Testsmentioning

confidence: 99%

AIRS: ARIEL IR spectrometer status

Amiaux¹,

Drossart²,

Pace³

et al. 2022

Space Telescopes and Instrumentation 2022: Optical, Infrared, and Millimeter Wave

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Low-flux long-wave infrared FPAs developments at LETI for science applications

LeGoff,

Ketchazo,

Lobre

et al. 2024

Infrared Technology and Applications L

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For several years, CEA-LETI has worked on the development of IR MCT detectors for low flux applications in scientific imaging. MCT has remarkable material properties that allow for highly performing detection, with high QEs and minimal dark currents. Currently, both Teledyne US and LETI-Lynred in France achieve dark currents in the range of a fraction of e/s/pixel for NIR imaging, utilizing the p-on-n extrinsic diode structure, for astronomy applications. As part of the NEOCAM project, Teledyne has demonstrated the ability to extend the cut-off wavelength to significantly longer wavelengths (10.3µm and recently 13µm) while keeping the dark current in the e/s range. Furthermore, LETI is presently enhancing its p-on-n technology to satisfy the demanding specifications of low-flux applications. Achieving very low dark current leakage and large diode polarisation plateaus is required to achieve SFD input stage ROIC operation and to reach such low dark current values. This entails the mitigation of tunnelling currents that appear in low-gap materials. In this report, we present the production of a 15µm pitch TV-size prototype array that operates in the LW range (8µm @ 35K). Dark current values as low as 0.5 e/s/pixel have been measured below 40K, and will be discussed.

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ARIEL early engineering model H1RG IR detector: test bench description and first characterization results

Cited by 4 publications

References 0 publications

Pixel source follower glow in HxRG detector

Pixel source follower glow in HxRG detector

AIRS: ARIEL IR spectrometer status

Low-flux long-wave infrared FPAs developments at LETI for science applications

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