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Proceedings Paper

Recent success on SLS FPAs and MDA's new direction for development
Author(s): Meimei Z. Tidrow; Lucy Zheng; Hank Barcikowski; James Wells; Leslie Aitcheson
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Paper Abstract

Over the past few years, the Missile Defense Agency Advanced Technology Directorate (MDA/DV) has funded the development of a new III-V infrared (IR) sensor focal plane material: type II strained layer superlattice (SLS). Infrared sensors are crucial to missile defense capabilities for target acquisition, tracking, discrimination, and aim point selection; they serve other military sensing applications as well. Most current infrared military systems use mercury-cadmiumtelluride (HgCdTe), a II-VI semiconductor material, for long-wavelength (LW) (8-12 um) focal plane array (FPA) applications. It is difficult to achieve large-format FPAs in HgCdTe at long wavelengths (LW) due to their low yield. The situation is aggravated by the limitation of the small cadmium-zinc-telluride (CdZnTe) substrates. SLS is the only known IR material that has a theoretical prediction of higher performance than HgCdTe. Over the past three years, SLS technology has progressed significantly, demonstrating experimentally its potential as a strong candidate for future highperformance IR sensor materials. In this paper, we will discuss the most recent progress made in SLS. We will also discuss MDA's new direction for this technology development. The plan is to use a horizontal integration approach instead of adhering to the existing vertical integration model. This new horizontal approach is to increase the number of industrial participants working in SLS and leverage existing III-V semiconductor foundries. Hopefully it will reduce the cost of SLS IR technology development, shared foundry maintenance, and future SLS production.

Paper Details

Date Published: 6 May 2009
PDF: 11 pages
Proc. SPIE 7298, Infrared Technology and Applications XXXV, 72981O (6 May 2009); doi: 10.1117/12.822879
Show Author Affiliations
Meimei Z. Tidrow, U.S. Army Night Vision & Electronic Sensors Directorate (United States)
Lucy Zheng, Institute for Defense Analysis (United States)
Hank Barcikowski, Missile Defense Agency (United States)
James Wells, Missile Defense Agency (United States)
Leslie Aitcheson, Missile Defense Agency (United States)

Published in SPIE Proceedings Vol. 7298:
Infrared Technology and Applications XXXV
Bjørn F. Andresen; Gabor F. Fulop; Paul R. Norton, Editor(s)

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