A monolithic 2k x 2k LWIR HgCdTe detector array for passively cooled space missions

Dorn, Meghan L.; McMurtry, Craig W.; Pipher, J. L.; Forrest, W. J.; Cabrera, Mario S.; Wong, Andre; Mainzer, Amy; Lee, Donald; Pan, Jianmei

doi:10.1117/12.2313521

Cited by 7 publications

(7 citation statements)

References 7 publications

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“…By choosing a proper thickness of this mask layer, the transmission through the meta-lens is enhanced. The focal length f is determined by the thickness of the CdZnTe film, which typically varies from 30 μm to 800 μm 42 , and it is assumed to be 73 μm in this study without loss of generality. The HgCdTe layer is epitaxially grown on the other side of the CdZnTe.…”

Section: Device Structurementioning

confidence: 99%

HgCdTe mid-Infrared photo response enhanced by monolithically integrated meta-lenses

Deng

Zhou

et al. 2020

Sci Rep

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for S m = 5 μm × 5 μm or S m = 10 μm × 10 μm. Further, the meta-lens exhibits a good dispersion tolerance over the wavelength range from 3.3 μm to 5 μm. The averaged detectivity enhancement over this spectrum range is around 3 times for S m = 5 μm × 5 μm and 2 times for S m = 10 μm × 10 μm. The angular response of the meta-lens integrated detector depends on the focal length. For a focal length of 73 μm, the AOV for a 5 μm × 5 μm photosensitive area is 4.0°. When the focal length is reduced to 38 μm, the AOV for a 5 μm × 5 μm photosensitive area increases to 7.7° and it reaches 15.4° for a 10 μm × 10 μm photosensitive area. For the inter-pillar distance to be 2 μm in our design, the influence of the coupling effect between the nano-pillars on the performance of the meta-lens is little. Therefore, the monolithic integration of a meta-lens provides us a promising way to enhance the performance of infrared photodetectors and even focal plane arrays.

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Section: Device Structurementioning

confidence: 99%

HgCdTe mid-Infrared photo response enhanced by monolithically integrated meta-lenses

Deng

Zhou

et al. 2020

Sci Rep

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“…The arrays have cut-off wavelengths of ∼ 10 µm, low read noise, high quantum efficiency (QE), and have operabilities (well depth of more than 44,000 e − and dark current less than 200 e − /s ) > 90% up to temperatures of 42 K, and have been proton irradiated and demonstrated the ability to withstand the cosmic ray radiation that they are expected to receive in space. [12][13][14] These devices have reached NASA Technical Readiness Level-6.…”

Section: Prior Development / Neocammentioning

confidence: 99%

“…irradiated and demonstrated the ability to withstand the cosmic ray radiation that they are expected to receive in space. [12][13][14] These devices have reached NASA Technical Readiness Level-6.…”

Section: Prior Development / Neocammentioning

confidence: 99%

“…We adopt the same dark current operablity requirements to that of the LW10 devices developed for the NEOCam mission. 14 Our imposed operability requirements include dark currents < 200 e − /s, and well depth of ∼ 40 ke − for an applied bias of 150 mV (larger well depth requirements are used for larger applied biases). The dark current requirement for NEOCam was established such that the mission's 6-10 µm channel will be background-limited by the thermal emission from the zodiacal dust cloud.…”

Section: Operabilitymentioning

confidence: 99%

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Development of 13-μm cutoff HgCdTe detector arrays for astronomy

Cabrera

McMurtry

Dorn

et al. 2019

J. Astron. Telesc. Instrum. Syst.

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Building on the successful development of the 10 µm HgCdTe detector arrays for the proposed NEOCam mission, the University of Rochester Infrared Detector team and Teledyne Imaging Systems are working together to extend the cutoff wavelength of HgCdTe detector arrays initially to 13 µm, with the ultimate goal of developing 15 µm HgCdTe detector arrays for space and ground-based astronomy. The advantage of HgCdTe detector arrays is that they can operate at higher temperatures than the currently used arsenic doped silicon detector arrays at the longer wavelengths. Our infrared detector team at the University of Rochester has received and tested four 13 µm detector arrays from Teledyne Imaging Systems with three different pixel designs, two of which are meant to reduce quantum tunneling dark current. The pixel design of one of these arrays has mitigated the effects of quantum tunneling dark currents for which we have been able to achieve, at a temperature of 28 K and applied bias of 350 mV, a well depth of at least 75 ke − for 90% of the pixels with a median dark current of 1.8 e − /sec. These arrays have demonstrated encouraging results as we move forward to extending the cutoff wavelength to 15 µm.

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“…2,3 Other detectors, such as the Teledyne Imaging Sensors' LWIR HgCdTe detector have a relatively higher quantum efficiency, however, they cover a shorter wavelength range (the LWIR HgCdTe detector extends out to 13 µm). 4 It is important thus to understand the spectrophotometric response of the Si:As IBC device across the long wavelength range covered in order to maximize scientific output.…”

Section: Introductionmentioning

confidence: 99%

Characterization of the optical properties of the buried contact of the JWST MIRI Si:As infrared blocked impurity band detectors

Argyriou¹,

Rieke²,

Ressler³

et al. 2020

Preprint

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The Mid-Infrared Instrument MIRI on-board the James Webb Space Telescope uses three Si:As impurity band conduction detector arrays. MIRI medium resolution spectroscopic measurements (R∼3500-1500) in the 5 µm to 28 µm wavelength range show a 10-30% modulation of the spectral baseline; coherent reflections of infrared light within the Si:As detector arrays result in fringing. We quantify the shape and impact of fringes on spectra of optical sources observed with MIRI during ground testing and develop an optical model to simulate the observed modulation. We use our optical model in conjunction with the MIRI spectroscopic data to show that the properties of the buried contact inside the MIRI Si:As detector have a significant effect on the fringing behavior.

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A monolithic 2k x 2k LWIR HgCdTe detector array for passively cooled space missions

Cited by 7 publications

References 7 publications

HgCdTe mid-Infrared photo response enhanced by monolithically integrated meta-lenses

HgCdTe mid-Infrared photo response enhanced by monolithically integrated meta-lenses

Development of 13-μm cutoff HgCdTe detector arrays for astronomy

Characterization of the optical properties of the buried contact of the JWST MIRI Si:As infrared blocked impurity band detectors

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