Design of High Efficient Mid‐Wavelength Infrared Polarizer on ORMOCHALC Polymer. Issue 5 (22nd March 2020)

• Record Type: Journal Article
• Authors: Islam, Md Didarul; Kim, Jun Oh; Ko, Yeongun; Ku, Zahyun; Boyd, Darryl A.; Smith, Evan M.; Nguyen, Vinh Q.; Myers, Jason D.; Baker, Colin C.; Kim, Woohong; Sanghera, Jasbinder S.; Czaplewski, David A.; Urbas, Augustine M.; Genzer, Jan; Ryu, Jong E.
• Is Part Of: Macromolecular materials and engineering. Volume 305:Issue 5(2020)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2020-03-22
• Subjects: Fabry–Pérot cavity -- linear polarizers -- mid‐wavelength infrared -- organically modified chalcogenides -- sulfur polymers; Plastics -- Periodicals; Polymers -- Periodicals; Polymerization -- Periodicals; 547.705
• DOI: 10.1002/mame.202000033
• Languages: English
• ISSNs: 1438-7492

Abstract

Abstract: While an organically modified chalcogenide (ORMOCHALC) can be used to fabricate a polymeric mid‐wavelength infrared (MWIR) polarizer with competitive extinction ratio compared to the commercial wire‐grid polarizers, which are composed of fragile inorganic materials, there is still a knowledge gap regarding the systematic design process to obtain high transmission efficiency and extinction ratio. To this end, a computational parameter study for design optimization is conducted with the geometric parameters of the bilayer grating ORMOCHALC polarizer. The computational study shows that the Fabry–Pérot cavity is the primary mechanism that determines the transmission behaviors and the extinction ratio. A bilayer grating design, guided by the parameter study, is realized through the thermal nanoimprint and metal deposition processes. The extinction ratios measured with the Fourier‐transform infrared are 245, 304, and 351 at the wavelength of 3, 4, and 5 µm, respectively. Compared to the state‐of‐the‐art of the polymeric MWIR linear polarizers, the extinction ratio is improved by 1.4 times, and the transmission efficiency is increased by 2.5 times. Theoretical analysis with the multiple‐layer model based on the transfer matrix method predicts a matched transmission behavior with the experiment and a full‐wave electromagnetic simulation. Abstract : The design approach and fabrication of a polymeric mid‐wavelength infrared (MWIR) polarizer is presented. The plasmonic polarizer is designed by a geometric parameter study and fabricated by imprinting an organically modified chalcogenide polymer with high MWIR transmissibility. The polymeric polarizer exhibits a competitive performance with a lower cost of manufacture compared to the current MWIR polarizers based on inorganic materials.