,,The Army VISTA program is working on innovative approaches for infrared FPA technology to enhance infrared sensor capabilities. VISTA's focus is in III-V epitaxial materials research such as superlattice (SL) and NbN structures for advanced infrared FPAs with large-formats and reduced pixel size that are capable of midwave infrared and longwave infrared (MWIR/LWIR) detection."
http://www.militaryaerospace.com/articles/2014/02/teledyne-vista-followon.html