# Design and fabrication of an all-dielectric grating with top-hat high diffraction efficiency over a broad spectral range

Lyndin 2007: By the author of MC Grating: design, fabrication and measurement of an all-dielectric −1st-order grating for femtosecond pulse compression. The…

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N. Lyndin, M. Flury, S. Tonchev, R. Fechner, O. Parriaux

N. Lyndin, M. Flury, S. Tonchev, R. Fechner and O. Parriaux, “Design and fabrication of an all-dielectric grating with top-hat high diffraction efficiency over a broad spectral range”, J. Eur. Opt. Soc.-Rapid Publ. **2**, 07019 (2007). [https://doi.org/10.2971/jeos.2007.07019](https://doi.org/10.2971/jeos.2007.07019)

By the author of MC Grating: design, fabrication and measurement of an all-dielectric −1st-order grating for femtosecond pulse compression. The corrugation is etched into the high-index hafnia layer on top of a 19-layer quarter-wave mirror, and the whole structure, mirror included, is optimised for a top-hat efficiency spectrum. Measured under TE incidence at 57°, the fabricated grating diffracts 97% on average, flat between 777 and 815 nm.

The paper states its own residual: the measured spectrum sits 3 nm to the blue of the modelled one, which it attributes to a layer-index error. The paper models the grating with a diffraction code based on the true-mode method, the method Modal Collinear implements for lamellar gratings.

**Implemented in**: [Modal Collinear](https://mcgrating.com/products.html#modal-collinear)

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**Bibliography**: [Reference [19]](https://mcgrating.com/references.html#ref-19)

**Full text**: [Design and fabrication of an all-dielectric grating with top-hat high diffraction efficiency over a broad spectral range](https://mcgrating.com/references/ref19.pdf) (PDF, 827 KB)

© 2007 EDP Sciences. This copy is hosted for the convenience of MC Grating users; the version of record is the publisher's, at the DOI above.

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