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Proceedings Paper

Development of non-hybridised HgCdTe detectors for the next generation of astronomical instrumentation
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Paper Abstract

The superb image quality that is predicted, and even demanded, for the next generation of Extremely Large Telescopes (ELT) presents a potential crisis in terms of the sheer number of detectors that may be required. Developments in infrared technology have progressed dramatically in recent years, but a substantial reduction in the cost per pixel of these IR arrays will be necessary to permit full exploitation of the capabilities of these telescopes. Here we present an outline and progress report of an initiative to develop a new generation of astronomical grade Cadmium Mercury Telluride (HgCdTe) array detectors using a novel technique which enables direct growth of the sensor diodes onto the Read Out Integrated Circuit (ROIC). This technique removes the need to hybridise the detector material to a separate Silicon readout circuit and provides a route to very large monolithic arrays. We present preliminary growth and design simulation results for devices based on this technique, and discuss the prospects for deployment of this technology in the era of extremely large telescopes.

Paper Details

Date Published: 22 July 2008
PDF: 5 pages
Proc. SPIE 7021, High Energy, Optical, and Infrared Detectors for Astronomy III, 70210I (22 July 2008); doi: 10.1117/12.787500
Show Author Affiliations
Gavin B. Dalton, Rutherford Appleton Lab. (United Kingdom)
Univ. of Oxford (United Kingdom)
Peter N. Dennis, QinetiQ Ltd. (United Kingdom)
David J. Lees, QinetiQ Ltd. (United Kingdom)
David J. Hall, QinetiQ Ltd. (United Kingdom)
John W. Cairns, QinetiQ Ltd. (United Kingdom)
Neil T. Gordon, QinetiQ Ltd. (United Kingdom)
Janet E. Hails, QinetiQ Ltd. (United Kingdom)
Jean Giess, QinetiQ Ltd. (United Kingdom)

Published in SPIE Proceedings Vol. 7021:
High Energy, Optical, and Infrared Detectors for Astronomy III
David A. Dorn; Andrew D. Holland, Editor(s)

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