High performance long wavelength infrared mega-pixel focal plane array based on type-II superlattices

Paritosh Manurkar*, Shaban Ramezani-Darvish, Binh Minh Nguyen, Manijeh Razeghi, John Hubbs

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

84 Scopus citations

Abstract

A large format 1k×1k focal plane array (FPA) is realized using type-II superlattice photodiodes for long wavelength infrared detection. Material growth on a 3 in. GaSb substrate exhibits a 50% cutoff wavelength of 11 μm across the entire wafer. The FPA shows excellent imaging. Noise equivalent temperature differences of 23.6 mK at 81 K and 22.5 mK at 68 K are achieved with an integration time of 0.13 ms, a 300 K background and f/4 optics. We report a dark current density of 3.3× 10-4 A cm -2 and differential resistance-area product at zero bias R 0 A of 166 ξ cm2 at 81 K, and 5.1× 10-5 A cm -2 and 1286 ξ cm2, respectively, at 68 K. The quantum efficiency obtained is 78%.

Original languageEnglish (US)
Article number193505
JournalApplied Physics Letters
Volume97
Issue number19
DOIs
StatePublished - Nov 8 2010

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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