A recent holographic technique makes it possible to manufacture a new kind of grating, the “Fourier grating”, whose profile is given by a superposition of a fundamental and a finite number of harmonics. A local theoretical optimization shows that this type of grating can have an efficiency better, than that of the echelette, for a broad wavelength range. In this paper, we show the validity of this theoretical prediction by an experimental verification in the microwave region.
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Bliek, P., Deleuil, R., Breidne, M. et al. Microwave verification of a numerical optimization of fourier gratings. Appl. Phys. 24, 147–150 (1981). https://doi.org/10.1007/BF00902272