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22 July 1998 Large-format SWIR/MWIR HgCdTe infrared focal plane arrays for astronomy
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Abstract
We have developed 1024 X 1024 HAWAII (HgCdTe Arrays for Wide-field Astronomical Infrared Imaging) focal plane arrays (FPAs) for use in astronomical applications. These devices have been delivered to various astronomy organizations around the world and have resulted in increased sensitivities and decreased observation times for deep space imaging. The detector material is PACE-I for SWIR and Molecular Beam Epitaxy (MBE) HgCdTe on CdZnTe for MWIR. The 1024 X 1024 multiplexer has a 18.5 micrometer unit cell pitch, source follower per detector (SFD) input, and it was fabricated at or internal commercial CMOS process line with excellent yield. Mean dark currents as low as 0.02 e-/s have been measured at 77 K for 2.5 micrometer devices (1024 X 1024 format, 18.5 micrometer pitch) and 0.39 e-/s for 5.3 micrometer devices at 50 K (256 X 256 format, 40 micrometer pitch). Quantum efficiencies are greater than 50% for both SWIR and MWIR detectors; with AR coatings, these are expected to be above 75%. Noise levels of 3 e- have been measured by multiple sampling techniques for the SWIR and 75 e- for the MWIR. All of these devices are simple to operate and are readily available. We are presently developing 2048 X 2048 FPAs with 18 micrometer unit cell pitch for both SWIR and MWIR applications.
© (1998) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Kadri Vural, Lester J. Kozlowski, Craig A. Cabelli, Scott A. Cabelli, Annie Chi-yi Chen, Donald E. Cooper, Gary L. Bostrup, Robert B. Bailey, Dennis E. Edwall, Jose M. Arias, G. A. Stanley, G. G. Price, J. A. Pinter, William E. Kleinhans, Klaus-Werner Hodapp, and Donald N. B. Hall "Large-format SWIR/MWIR HgCdTe infrared focal plane arrays for astronomy", Proc. SPIE 3379, Infrared Detectors and Focal Plane Arrays V, (22 July 1998); https://doi.org/10.1117/12.317624
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