High contrast polarization sensitive quantum well infrared photodetectors

被引:30
作者
Antoni, Thomas
Nedelcu, Alexandru
Marcadet, Xavier
Facoetti, Hugues
Berger, Vincent
机构
[1] Grp Interet Econ, Alcatel Thales Lab 3 5, F-91767 Palaiseau, France
[2] Univ Paris 07, F-75205 Paris 13, France
关键词
D O I
10.1063/1.2739408
中图分类号
O59 [应用物理学];
学科分类号
摘要
The responsivity of polarization sensitive quantum well infrared photodetectors with small pixel size (down to 20 mu m) is investigated. It is shown that pixels suitable for integration into very large focal plane arrays (1000x1000) can discriminate the polarization of the incoming signal. A responsivity contrast higher than 60% is obtained although the grating size is reduced to only six periods. The quantum efficiency and polarimetric capabilities can be both optimized with the same grating parameters. (C) 2007 American Institute of Physics.
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页数:3
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