EO/IR Nanosensors are being developed for a variety of Defense and Commercial Systems
Applications. These include UV, Visible, NIR, MWIR and LWIR Nanotechnology based
Sensors. The conventional SWIR Sensors use InGaAs based IR Focal Plane Array (FPA) that
operate in 1.0-1.8 micron region. Similarly, MWIR Sensors use InSb or HgCdTe based FPA that
is sensitive in 3-5 micron region. More recently, there is effort underway to evaluate low cost
SiGe visible and near infrared band that covers performance up to 1.6 micron.
The use of Nanowires for developing high quality antireflection coatings that allows minimizing
the reflection loss is discussed. We have explored the possibility of using nanostructures grown
by oblique angle deposition technique. A graded-index coating with different index profiles has
been investigated for broadband antireflection properties, particularly with air as the ambient
medium. In this paper, we present, modeling and experimental results for nanostructure
AR coatings for UV, Visible and calculations for NIR sensors and also their utility for
longer wavelength application.