Measurement of phase difference between the diffracted orders of relief gratings using two-wave mixing

Summary form only given. Surface relief gratings in both resonant and subwavelength domain present interesting polarisation properties. The phase of the diffracted orders, in deep relief gratings, depends on the polarization and on the grating parameters. In this paper we propose the use of a two-wave mixing experiment to measure the phase difference between the first and the zero diffracted orders of holographic relief gratings.