Ultrathin Ge-YF₃ antireflective coating with 0.5 % reflectivity on high-index substrate for long-wavelength infrared cameras.

ABSTRACT: Achieving long-wavelength infrared (LWIR) cameras with high sensitivity and shorter exposure times faces challenges due to series reflections from high-refractive index lenses within compact optical systems. However, designing effective antireflective coatings to maximize light throughput in these systems is complicated by the limited range of transparent materials available for the LWIR. This scarcity narrows the degrees of freedom in design, complicating the optimization process for a system that aims to minimize the number of physical layers and address the inherent large refractive mismatch from high-index lenses. In this study, we use discrete-to-continuous optimization to design a subwavelength-thick antireflective multilayer coating on high-refractive index Si substrate for LWIR cam

SUBMITTER: Yu JS 

PROVIDER: S-EPMC11501071 | biostudies-literature | 2024 Sep

REPOSITORIES: biostudies-literature