VLWIR SLS Digital FPA and Camera for Imaging Spectroscopy

Period of Performance: 09/27/2013 - 03/31/2014


Phase 1 STTR

Recipient Firm

Qmagiq, LLC
22 Cotton Road Array
Nashua, NH 03063
Principal Investigator
Firm POC

Research Institution

MIT Lincoln Labs
244 Wood Street
Lexington, MA 02420
Institution POC


QmagiQ and MIT-LL propose to partner to develop a very longwave infrared (VLWIR) digital focal plane array (DFPA) and camera for imaging spectroscopy applications. The DFPA will be based on Type-II InAs/GaSb strained layer superlattice (SLS) photodiodes with > 13 micron cutoff, hybridized to a 640x480 digital readout integrated circuit (DROIC). In Phase I , QmagiQ will develop a 13 micron cutoff detector with the goal of high quantum efficiency and a low dark current that drops to acceptable levels on cooling to ~ 45K. Performance will be demonstrated on test devices and on MIT-LL's 256x256 DROIC which permits better-passivated pixels and which can tolerate higher dark currents while yielding good signal-to-noise. MIT-LL will characterize the DFPA. In Phase II, QmagiQ will increase array format to 640x480 and work with MIT-LL to package the DFPA into a compact digital camera that will be delivered to DOD for evaluation. The camera may be particularly useful in an infrared hyperspectral imaging system for the stand-off detection of homemade explosives.