Simulation Study of Readily Manufactured High-Performance Polarization Gratings Based on Cured HSQ Materials

Polarimetric imaging technology captures both traditional intensity information and multidimensional polarization data, significantly enhancing target–background contrast and boosting detection system recognition. However, monolithic integration of grating polarizers into large-area focal plane arrays faces challenges, including complex fabrication, low extinction ratios, and high rates of blind elements. In this article, we present a simulation model for the fabrication of high-performance polarized gratings using electron-beam cured HSQ (Hydrogen Silsesquioxane Polymer) materials technology. By optimizing structural design, a high transmittance of 88–97% and an extinction ratio of ≥55 dB over a wide spectral range of 3–5 µm was achieved. This result offers a new approach to advancing high-performance infrared polarization imaging technology.