Long-wavelength type-II photodiodes operating at room temperature

H. Mohseni, M. Razeghi*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

30 Scopus citations

Abstract

The operation of uncooled InAs-GaSb superlattice photodiodes with a cutoff wavelength of λ c = 8 μm and a peak detectivity of 1.2 × 10 8 cmHz 1/2/W at zero bias is demonstrated. The detectivity is similar to the best uncooled HgCdTe detectors and microbolometers. However, the R 0A product is more than two orders of magnitude higher than HgCdTe and the device is more than four orders of magnitude faster than microbolometers. These features combined with their low 1/f noise and high uniformity make these type-II photodiodes an excellent choice for uncooled high-speed IR imaging arrays.

Original languageEnglish (US)
Pages (from-to)517-519
Number of pages3
JournalIEEE Photonics Technology Letters
Volume13
Issue number5
DOIs
StatePublished - May 1 2001

Keywords

  • Infrared detectors
  • Infrared imaging
  • Photodiodes
  • Semiconductor devices
  • Superlattices

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Electrical and Electronic Engineering

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