Large-format voltage-tunable dual-color midwavelength infrared quantum-well infrared photodetector focal plane array

被引：10

作者：

Kaldirim, M. ^{[1
]}

Eker, S. U. ^{[1
]}

Arslan, Y. ^{[1
]}

Tumkaya, U. ^{[2
]}

Besikci, C. ^{[1
]}

机构：

[1] Middle E Tech Univ, Dept Elect Engn, TR-06531 Ankara, Turkey

[2] Middle E Tech Univ, Dept Phys, TR-06531 Ankara, Turkey

来源：

IEEE PHOTONICS TECHNOLOGY LETTERS | 2008年 / 20卷 / 9-12期

关键词：

focal plane array (FPA); infrared detector;

D O I：

10.1109/LPT.2008.920026

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 a large-format (640 x 512) voltage-tunable quantum-well infrared photodetector (QWIP) focal plane array (FPA) for dual-color imaging in the midwavelength infrared (3-5 mu m) band. Voltage-tunable spectral response has been achieved through series connection of two eight-well stacks of AlGaAs-InGaAs epilayers grown by molecular beam epitaxy on GaAs substrate. The peak responsivity wavelength of the detectors is shifted from 4.1 mu m (color 1) to 4.7 mu m (color 2) as the bias is increased within the limit applicable by commercial read-out integrated circuits. The operability of the FPA is similar to 99.5% with noise equivalent temperature differences of similar to 60 and 30 mK (f/1.5) in color modes 1 and 2, respectively. To our knowledge, this is the first large-format voltage-tunable dual-color QWIP FPA reported for midwavelength thermal imaging.

引用

页码：709 / 711

页数：3

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