Polarizing beam splitter for vacuum ultraviolet to x-ray radiation

We present a v-groove grating functioning as a polarizing beam splitter. The grating works in the off-plane or conical diffraction geometry. In order to guarantee polarization selectivity and efficiency, the v-groove is designed to split the incoming radiation with a single reflection at the Brewster angle of the grating coating. This geometry is conceptually the same as the one reported by Caretta et al. [Struct. Dyn. 8, 034304 (2021)], but it reduces the noise on the splitting ratio introduced by beam-shape variations or beam displacements. We calculate the groove size to simultaneously perform polarization and spectral analysis.