Low irradiance background limited type-II superlattice MWIR M-barrier imager

Edward Kwei Wei Huang, Siamak Abdollahi Pour, Minh Anh Hoang, Abbas Haddadi, Manijeh Razeghi*, Meimei Z. Tidrow

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

14 Scopus citations


We report a type-II superlattice mid-wave infrared 320 × 256 imager at 81 K with the M-barrier design that achieved background limited performance (BLIP) and ∼99%operability. The 280 K blackbody's photon irradiance was limited by an aperture and a band-pass filter from 3.6 μm to 3.8 μm resulting in a total flux of ∼5 × 1012 ph:cm -2:s-1. Under these low-light conditions, and consequently the use of a 13.5 ms integration time, the imager was observed to be BLIP thanks to a ∼5 pA dark current from the 27 μm wide pixels. The total noise was dominated by the photon flux and read-out circuit which gave the imager a noise equivalent input of ∼5 × 1010 ph:cm -2:s-1 and temperature sensitivity of 9 mK with F/2.3 optics. Excellent imagery obtained using a 1-point correction alludes to the array's uniform responsivity.

Original languageEnglish (US)
Pages (from-to)2025-2027
Number of pages3
JournalOptics Letters
Issue number11
StatePublished - Jun 1 2012

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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