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Proceedings Paper

Small pitch, large format long-wave infrared QWIP focal plane arrays for polarimetric imagery
Author(s): Alexandru Nedelcu; Hugues Facoetti; Eric Costard; Philippe Bois
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Paper Abstract

We report on the first demonstration of a large format (640x512), small pitch (20&mgr;m), polarization sensitive long-wave infrared focal plane array. The choice of quantum well infrared photodetectors allows the monolithic integration of the polarizing element (1D gratings) into the focal plane array. The performance (response, NETD) under natural light is identical to that of polarization insensitive focal plane arrays, with the same pitch. Polarization contrast capabilities are investigated experimentally and are shown to be compatible with polarimetric imaging needs. Responsivity contrasts higher than 35% are obtained, on square 18.6&mgr;m pixels. Preliminary results on extremely compact arrays (15&mgr;m pitch) are presented.

Paper Details

Date Published: 14 May 2007
PDF: 9 pages
Proc. SPIE 6542, Infrared Technology and Applications XXXIII, 65420U (14 May 2007); doi: 10.1117/12.720824
Show Author Affiliations
Alexandru Nedelcu, Alcatel-Thales III-V Lab., Thales Research & Technology (France)
Hugues Facoetti, Alcatel-Thales III-V Lab., Thales Research & Technology (France)
Eric Costard, Alcatel-Thales III-V Lab., Thales Research & Technology (France)
Philippe Bois, Alcatel-Thales III-V Lab., Thales Research & Technology (France)

Published in SPIE Proceedings Vol. 6542:
Infrared Technology and Applications XXXIII
Bjørn F. Andresen; Gabor F. Fulop; Paul R. Norton, Editor(s)

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