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Proceedings Paper

Visible and infrared detectors at Rockwell Science Center
Author(s): Lester J. Kozlowski; John T. Montroy; Craig A. Cabelli; Donald E. Cooper; Annie Chi-yi Chen; Gary L. Bostrup; Yibin Bai; Kadri Vural; Klaus-Werner Hodapp; Donald N. B. Hall
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Paper Abstract

Rockwell Space Center is developing low-noise visible and IR imaging sensors and systems for astronomy, high-end commercial, NASA, and advanced military applications. The first science grade 2048 by 2048 HAWAII-2 focal plane array (FPA) for astronomy was recently demonstrated for the SWIR waveband. Science-grade deliveries to the University of Hawaii's Institute for Astronomy, the European Southern Observatory and the Subaru Telescope, among others, will soon start. MWIR/visible 2048 by 2048 HAWAII-2 arrays are also being developed for the NGST program using our process for removing the CdZnTe substrate from the back-side illuminated HgCdTe FPAs to detect visible radiation in addition to IR. Previously, more than 25 science grade 2.5micrometers 1024 by 1024 HAWAII FPAs were delivered for use in many observatories; these typically exhibit < 0.1 e-/s dark current and < 10 e- read noise after correlated double sampling at temperatures above 60K. 1024 by 1024 FPAs development is also continuing; dark current < 1 e-/s has been measured at 140K for a NIR 1024 by 1024 HAWAII array. In a related effort, development of high frame rate, low noise FPAs has begun for wavefront sensing including adaptive optical systems for both visible and NIR/SWIR bands. Hybrid Visible Silicon Imager development is also continuing, expanding the success achieved with prior 640 by 480 FPAs. We are now demonstrating 1024 by 1024 arrays with 0.3-1.05 micrometers response. The silicon detectors in HyViSI FPAs are independently processed on silicon wafers and mated to the same multiplexers fabricated originally for interface to HgCdTe detectors. HyViSI FPA quantum efficiency is > 90 percent with near-100 percent fill factor, and the dark current is negligible with minimum cooling. Our near-term plan to develop 4096 by 4096 visible and IR FPAs will also be discussed.

Paper Details

Date Published: 16 August 2000
PDF: 14 pages
Proc. SPIE 4008, Optical and IR Telescope Instrumentation and Detectors, (16 August 2000); doi: 10.1117/12.395443
Show Author Affiliations
Lester J. Kozlowski, Rockwell Science Ctr. (United States)
John T. Montroy, Rockwell Science Ctr. (United States)
Craig A. Cabelli, Rockwell Science Ctr. (United States)
Donald E. Cooper, Rockwell Science Ctr. (United States)
Annie Chi-yi Chen, Rockwell Science Ctr. (United States)
Gary L. Bostrup, Rockwell Science Ctr. (United States)
Yibin Bai, Rockwell Science Ctr. (United States)
Kadri Vural, Rockwell Science Ctr. (United States)
Klaus-Werner Hodapp, Institute for Astronomy/Univ. of Hawaii at Manoa (United States)
Donald N. B. Hall, Institute for Astronomy/Univ. of Hawaii at Manoa (United States)

Published in SPIE Proceedings Vol. 4008:
Optical and IR Telescope Instrumentation and Detectors
Masanori Iye; Alan F. M. Moorwood, Editor(s)

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