The efficiency of conventional diffractive optical elements with échelette-type profiles drops rapidly as the illumination wavelength departs from the blaze wavelength. We use high dispersion of artificial materials to synthesize diffractive optical elements that are blazed over a broad spectral range (~1 octave) or for two different wavelengths.
© 2004 Optical Society of America
Christophe Sauvan, Philippe Lalanne, and Mane-Si Laure Lee, "Broadband blazing with artificial dielectrics," Opt. Lett. 29, 1593-1595 (2004)