Large-format voltage-tunable dual-band quantum-well infrared photodetector focal plane array for third-generation thermal imagers

被引：21

作者：

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

Kaldirim, M. ^{[1
]}

Arslan, Y. ^{[1
]}

Besikci, C. ^{[1
]}

机构：

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

来源：

IEEE ELECTRON DEVICE LETTERS | 2008年 / 29卷 / 10期

关键词：

dual-band infrared detector; focal plane array (FPA);

D O I：

10.1109/LED.2008.2002538

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 (QW) infrared photodetector focal plane array (FPA) for dual-band imaging in the mid- and long-wavelength infrared (MWIR and LWIR) bands. Voltage-tunable spectral response has been achieved through a series connection of eight-well MWIR AlGaAs-InGaAs and 16-well LWIR AlGaAs-GaAs QW stacks grown by molecular beam epitaxy on GaAs substrate. The peak responsivity wavelength of the detectors is shifted from 4.8 to 8.4 mu m as the bias is increased within the limit applicable by commercial read-out integrated circuits. The FPA with MWIR and LWIR cutoff wavelengths of 5.1 and 8.9 mu m provides noise equivalent temperature differences of 20 and 32 mK (f/1.5) in these bands, respectively. The results are very encouraging for the development of low-cost large-format dual-band MWIR/LWIR FPA technology.

引用

页码：1121 / 1123

页数：3

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