High Performance Nano-Wire-Grid Wide-angle Broadband Polarizing Beamsplitters

Period of Performance: 02/06/2001 - 08/06/2001


Phase 1 SBIR

Recipient Firm

Nanonex Corp.
1 Deer Park Drive Suite O
Monmouth Junction, NJ 08852
Principal Investigator


This small business innovation research phase-I project will provide the design and the proof-of-principle demonstration of high-performance wide-angle, broadband (over the visible spectrum) polarizing beam-splitters. The proposed polarizing beam-splitters (PBSs) use nano-wire-grid as the polarization element, and hence is coined nano-wire-grid PBS (NWG-PBS). The proposed research will optimize the design of the geometry (size, pitch and shape) of the metal wire girds and supporting dielectric materials, as well as the selection of these materials, to achieve the desired extinction ratio, splitting efficiency, and transmittance in the wavelength range from near-infrared down to 400 nm. The designs will be first tested using simulation tools, then will be fabricated and characterized experimentally. The key tool of the fabrication is nanoimprint lithography, which can allow low-cost, high throughput patterning of sub-10 nm features over a large area- one of the expertise of Nanonex Corporation.The proposed NWG-PBS has many superior performances over existing PBSs, including (1) high polarization efficiency (> 99%) and high extinction ratio (> 100:1) for both s- and p- polarizations throughout the visible spectrum; (2) high transmission and reflection efficiencies (both > 95%); (3) large working incident angle range (0°±45°) and acceptance angle throughout the visible spectrum; (4) large clear working aperture (up to 5 inches in diameter); (5) ultra-thin active layer (