Diffraction analysis and experimental investigation of reflection-free holographic phase gratings

Development of an efficient large-aperture high damage-threshold sol-gel diffraction grating.

“…For DCG production, an ideal aerogel AR is not possible and a standard dielectric hard coat may distort the delicate gelatin. As such, a bit of investigation suggested that, if the grating is designed and used at p-polarization, the fact that the grating use angle is so near to Brewster's angle (for which p-polarized reflections are minimized) may mitigate the strong etaloneffect from the gelatin layer seen with s-polarization [30] (see Fig. 6).…”

Interferometric characterization of subwavelength lamellar gratings

“…In diffractive optics this approach has been applied to a large variety of problems including, for example, metallic gratings, 2 large-period gratings, 3 and volume gratings. 4 More recently, ellipsometric arrangements allowing for additional information from the phase of the diffracted orders were used by Cui and Azzam 5 to characterize blazed metallic gratings and by Giovannini et al 6 to characterize holographic sinusoidal aluminum gratings by exploitation of plasmon resonances. In semiconductor metrology, 7 intensity measurements and ellipsometry are now widely employed for in situ control and monitoring of growth and etching of periodic silicon surfaces ͑see, for example, Refs.…”