Small pitch, large format long-wave infrared QWIP focal plane arrays for polarimetric imagery

被引：4
|
作者：
Nedelcu, Alexandru [1 ]
Facoetti, Hugues [1 ]
Costard, Eric [1 ]
Bois, Philippe [1 ]
机构：
[1] Thales Res & Technol France, Grp Interet Econ, Alcatel Thales Lab 3 5, Route Dept 128, F-91767 Palaiseau, France
来源：
INFRARED TECHNOLOGY AND APPLICATIONS XXXIII | 2007年 / 6542卷
关键词：
QWIP; infrared; LWIR; polarization;
D O I：
10.1117/12.720824
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
We report on the first demonstration of a large format (640x512), small pitch (20 mu 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 mu m pixels. Preliminary results on extremely compact arrays (15 mu m pitch) are presented.
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页数：9
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