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

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

Aug 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008spie.7021e..14d&link_type=abstract

High Energy, Optical, and Infrared Detectors for Astronomy III. Edited by Dorn, David A.; Holland, Andrew D. Proceedings of

Astronomy and Astrophysics

Astronomy

Scientific paper

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.

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