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15 July 2010 Latest progress in developing large format Ge arrays for far-IR astronomy
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Abstract
Germanium photoconductors offer excellent sensitivity in the 50-140μm spectral range. Coupled with their modest cooling requirements and their compatibility with the silicon cryo-CMOS readout technology, these detectors are the most attractive candidates for far IR astronomy in this wavelength range. Over the years we have been pursuing the advancement of this technology and our initial effort has produced a 2x16 Ge:Sb array with an NEP in the low 10-18 W/√Hz range, rivaling the best far IR arrays currently available. Further work has resulted in design and fabrication of a low noise, 2-side buttable 32x32 (64x64 mosaic) CTIA readout, the first 1k-pixel Ge:Sb fully assembled focal-plane array, a new hybrid design better suited for far IR photoconductors, and the preliminary design of a 2-side buttable 64x64 (128x128 mosaic) CTIA readout. Our developmental work continues and we believe that sensitivity levels below 10-18 W/√Hz are within reach. This paper presents an overview of our progress so far and outlines our roadmap for further work.
© (2010) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Jam Farhoomand, David L. Sisson, and Jeffrey W. Beeman "Latest progress in developing large format Ge arrays for far-IR astronomy", Proc. SPIE 7741, Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy V, 77410A (15 July 2010); https://doi.org/10.1117/12.855946
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