Principal angles and principal azimuths of a high-index transparent thin film on a low-index transparent substrate: Si on glass in the near infrared

Principal angles of incidence and associated principal azimuths, at which incident linearly polarized light becomes circularly polarized upon reflection, are determined for an IR-transparent high-index Si film (of the proper thickness) which is deposited on a low-index SiO2 (glass) substrate at the near-IR wavelength lambda = 1.55 The results are substantially different from those reported by the author [Appl. Opt 57, 9529-9532 (2018)] for the SiO2-Si (film-substrate) system at the same wavelength. The intensity reflectances for incident p- and s-polarized light, and the linear-to-circular polarization conversion efficiency are also calculated as functions of the principal angle.