Large format AlInAs-InGaAs quantum-well infrared photodetector focal plane array for midwavelength infrared thermal imaging


Ozer S., Tumkaya U. , Besikci C.

IEEE PHOTONICS TECHNOLOGY LETTERS, cilt.19, ss.1371-1373, 2007 (SCI İndekslerine Giren Dergi) identifier identifier

  • Cilt numarası: 19
  • Basım Tarihi: 2007
  • Doi Numarası: 10.1109/lpt.2007.903338
  • Dergi Adı: IEEE PHOTONICS TECHNOLOGY LETTERS
  • Sayfa Sayıları: ss.1371-1373

Özet

We report the first large format (640 x 512) AlInAs-InGaAs quantum-well infrared photodetector (QWIP) focal plane array (FPA), and investigate the characteristics of AlInAs-InGaAs QWIPs both at pixel and FPA level. The measurements on the detectors fabricated with molecular beam epitaxy grown epilayer structure including 30 InGaAs quantum wells (26 A thick, N-D = 2 x 10(18) cm(-3)) yielded very promising characteristics. The detectors with lambda(p) = 4.2 mu m and Delta lambda/lambda(p) = 25% displayed a background-limited performance temperature as high as 105 K with f/2 aperture. The noise equivalent temperature difference of the FPA is as low as 23 mK (f/1.5) at 105-K sensor temperature with 99.6% operability. These results are comparable to the best results reported for AlGaAs-InGaAs midwavelength infrared QWIPs showing the promise of this material system for completely lattice-matched multiband QWIP FPAs.