A high-performance long wavelength superlattice complementary barrier infrared detector

We describe a long wavelength infrared detector where an InAs/GaSb superlattice absorber is surrounded by a pair of electron-blocking and hole-blocking unipolar barriers. A 9.9   μ m cutoff device without antireflection coating based on this complementary barrier infrared detector design exhibits a...

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Bibliographic Details
Published in:Applied physics letters 2009-07, Vol.95 (2), p.023508-023508-3
Main Authors: Ting, David Z.-Y., Hill, Cory J., Soibel, Alexander, Keo, Sam A., Mumolo, Jason M., Nguyen, Jean, Gunapala, Sarath D.
Format: Article
Language:English
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Summary:We describe a long wavelength infrared detector where an InAs/GaSb superlattice absorber is surrounded by a pair of electron-blocking and hole-blocking unipolar barriers. A 9.9   μ m cutoff device without antireflection coating based on this complementary barrier infrared detector design exhibits a responsivity of 1.5 A/W and a dark current density of 0.99 × 10 − 5   A / cm 2 at 77 K under 0.2 V bias. The detector reaches 300 K background limited infrared photodetection (BLIP) operation at 87 K, with a black-body BLIP D ∗ value of 1.1 × 10 11   cm Hz 1 / 2 / W for f / 2 optics under 0.2 V bias.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.3177333