Large-area multilayer infrared nano-wire grid polarizers

• Technology of creating high quality multilayer IR wire grid polarizers was developed.
• Fabricated polarizers are large-area (170 cm2) and flexible.
• Polarizers are broadband and have high extinction ratio (up to 3 ⋅ 104).
• Method for fabrication of polarizers on 3D-printed curved surfaces was developed.

We have developed a technology for fabricating infrared polarizers based on double- and four-layer metal-dielectric nanogratings. Due to the use of nanoimprint lithography, the size of fabricated samples with 190-nm grating period could be made exceeding 170 cm2. The fabricated polarizers are flexible, and they have high quality over the entire area of the sample. Spectrophotometric measurements and numerical simulations have showed that the polarizers exhibited a large transmission coefficient and a high extinction ratio (over 3 ⋅ 104). In order to expand applications of polarizers to the bio-inspired wide field-of-view systems, technology for fabricating polarizers on curved surfaces prepared by 3D printing has been developed. The obtained results offer much promise for polarimetry purposes.