13 micron cutoff HgCdTe detector arrays for space and ground-based astronomy

McMurtry, Craig W.; Cabrera, Mario S.; Dorn, Meghan L.; Pipher, J. L.; Forrest, W. J.

doi:10.1117/12.2233616

Cited by 3 publications

(2 citation statements)

References 3 publications

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“…For the past three years, UR has been extending this technology to longer wavelength cutoffs. The results for 13-μm cutoff wavelength detector arrays were very promising with dark currents, well depths, and operabilities [23][24][25] similar to those of the earlier 10-μm cutoff wavelength detector array produced for NEOSM. For the 15-to 16-μm cutoff wavelength detector arrays produced in the second half of the UR development program, 26 the dark currents were higher and the well depths were lower than Origins requirements.…”

Section: Hgcdte Detector Development Planmentioning

confidence: 57%

Mid-infrared detector development for the Origins Space Telescope

Roellig

McMurtry

Greene

et al. 2020

J. Astron. Telesc. Instrum. Syst.

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Section: Hgcdte Detector Development Planmentioning

confidence: 57%

Mid-infrared detector development for the Origins Space Telescope

Roellig

McMurtry

Greene

et al. 2020

J. Astron. Telesc. Instrum. Syst.

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“…Figure 1 shows an image of the GeoSnap focal plane module SN20561, consisting of a 13-𝜇m cutoff HgCdTe die hybridized onto a single 1024 × 1024 quadrant. The HgCdTe material originated from a program led by the University of Rochester to develop longwave HxRG arrays out to 15 𝜇m (e.g., C. W. McMurtry et al 2016;Dorn et al 2018;Cabrera et al 2019;Cabrera et al 2020).…”

Section: Device Descriptionmentioning

confidence: 99%

Evaluating the GeoSnap 13‐μ$$ \mu $$m cutoff HgCdTe detector for mid‐IR ground‐based astronomy

et al. 2023

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New mid‐infrared HgCdTe (MCT) detector arrays developed in collaboration with Teledyne Imaging Sensors (TIS) have paved the way for improved 10‐m sensors for space‐ and ground‐based observatories. Building on the successful development of longwave HAWAII‐2RGs for space missions such as NEO Surveyor, we characterize the first 13‐m GeoSnap detector manufactured to overcome the challenges of high‐background rates inherent in ground‐based mid‐IR astronomy. This test device merges the longwave HgCdTe photosensitive material with Teledyne's GeoSnap‐18 (18‐m pixel) focal plane module, which is equipped with a capacitive transimpedance amplifier (CTIA) readout circuit paired with an onboard 14‐bit analog‐to‐digital converter (ADC). The final assembly yields a mid‐IR detector with high QE, fast readout (>85 Hz), large well depth (>1.2 million electrons), and linear readout. Longwave GeoSnap arrays would ideally be deployed on existing ground‐based telescopes as well as the next generation of extremely large telescopes. While employing advanced adaptive optics (AO) along with state‐of‐the‐art diffraction suppression techniques, instruments utilizing these detectors could attain background‐ and diffraction‐limited imaging at inner working angles <10 /D, providing improved contrast‐limited performance compared with JWST MIRI while operating at comparable wavelengths. We describe the performance characteristics of the 13‐m GeoSnap array operating between 38 45 K, including quantum efficiency, well depth, linearity, gain, dark current, and frequency‐dependent () noise profile.

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