Bragg-angle blazing of diffraction gratings*

摘要: The Bragg condition λ = 2d sin θ is presented as a necessary for perfect (100%) blazing of infinite, perfectly conducting diffraction gratings that produce only single diffracted order, n −1. As an illustration, the rectangular-profile grating analyzed. Design blaze curves, showing required depth function angle incidence, each polarization, are obtained. Intersections corresponding curves two polarizations yield parameters blazed simultaneously in both polarizations. incidence at which this achieved depends on shape grating. Gratings so designed have theoretical 100% efficiency design frequency, and above 90% over bandwidth more than 10%.