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A high-performance long wavelength superlattice complementary barrier infrared detector

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7 Author(s)
Ting, David Z.-Y. ; Jet Propulsion Laboratory, California Institute of Technology, Pasadena, California 91109, USA ; Hill, Cory J. ; Soibel, A. ; Keo, S.A.
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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 μm 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/cm2 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 1.1×1011 cmHz1/2/W for f/2 optics under 0.2 V bias.

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Applied Physics Letters  (Volume:95 ,  Issue: 2 )