Effect of barrier width on the performance of quantum well infrared photodetector

Steven K.H. Sim, H. C. Liu, A. Shen, M. Gao, Kevin F. Lee, M. Buchanan, Y. Ohno, H. Ohno, E. H. Li

Research output: Contribution to journalArticlepeer-review

10 Citations (Scopus)


We present a study on a set of AlGaAs/GaAs quantum well infrared photodetectors with various barrier widths from about 100 to 500 Å. At 77 K and for a large field-of-view (FOV) 300-K background operation, measured results on dark current, responsivity, and detectivity indicate that detectors with barrier widths larger than about 200 Å have similar performance. For 60-70 K and F/2 FOV, barriers need to be larger than about 300 Å to suppress inter-well tunneling.

Original languageEnglish
Pages (from-to)115-121
Number of pages7
JournalInfrared Physics and Technology
Issue number3-5
Publication statusPublished - 2001 Jun


  • Design parameter
  • Quantum well infrared photodetector

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Condensed Matter Physics


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