640$\,\times\,$512 Pixels Long-Wavelength Infrared (LWIR) Quantum-Dot Infrared Photodetector (QDIP) Imaging Focal Plane Array

  title={640\$\,\times\,\$512 Pixels Long-Wavelength Infrared (LWIR) Quantum-Dot Infrared Photodetector (QDIP) Imaging Focal Plane Array},
  author={S. D. Gunapala and S. V. Bandara and C. J. Hill and D. Z-Y Ting and J. K. Liu and B. Rafol and E. R. Blazejewski and J. M. Mumolo and S. A. Keo and Sanjay Krishna and Y. Chang and C. A. Shott},
  journal={IEEE Journal of Quantum Electronics},
Epitaxially grown self-assembled InAs-InGaAs-GaAs quantum dots (QDs) are exploited for the development of large-format long-wavelength infrared focal plane arrays (FPAs). The dot-in-a-well (DWELL) structures were experimentally shown to absorb both 45deg and normal incident light, therefore, a reflection grating structure was used to enhance the quantum efficiency. The devices exhibit peak responsivity out to 8.1 mum, with peak detectivity reaching ~1times1010 Jones at 77 K. The devices were… CONTINUE READING
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