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Waveguiding in blazed-binary diffractive elements

Philippe Lalanne 1
1 Laboratoire Charles Fabry de l'Institut d'Optique / Naphel
LCFIO - Laboratoire Charles Fabry de l'Institut d'Optique
Abstract : Recent experimental and numerical results clearly show that blazed-binary diffractive elements outperform their standard blazed-e'chelette counterparts in the resonance domain. A theoretical study of one-dimensional blazed-binary gratings shows that the reason for this high efficiency is a waveguiding effect. The electromagnetic study supports the idea that, through waveguiding, a reduction of the shadowing zone is achieved, and thus the efficiency is increased. This is intrinsic to high-frequency binary structures and cannot be achieved with standard e'chelette diffractive elements.
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Philippe Lalanne. Waveguiding in blazed-binary diffractive elements. Journal of the Optical Society of America. A Optics, Image Science, and Vision, Optical Society of America, 1999, 16 (10), pp.2517-2520. ⟨hal-00867723⟩

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