Nano-Optical Elements for Polarization Selective Infrared Detection

Prime Research and the University of North Carolina at Charlotte propose developing space-variant nano-optical elements to integrate passive spectral and polarization filters directly into infrared focal plane arrays. This novel technology will enable pixels to be uniquely tuned for wavelength and polarization across a focal plane array using a simple fabrication process that is suitable for volume production. Photonic crystals will perform the filtering functions and provide additional mechanisms to further enhance performance. Key performance goals are broadband operation and consistent behavior at oblique angles of incidence. Developmental efforts include design and experimental testing of space-variant photonic crystal filters with integrated polarizing elements. Exploratory concepts include incorporating left-handed materials to achieve omni-directional performance and self-collimation to reduce blurring and defocusing through the element. The proposed technology promises revolutionary advances in remote sensing, surveillance, target discrimination, imaging, spectroscopy, and more.