MC GratingDesign and fabrication of an all-dielectric grating with top-hat high diffraction efficiency over a broad spectral range
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
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.
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© 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.
MC Grating is Windows software that computes diffraction gratings by the modal method and the C method. The download page has the current release, which runs in demo mode without a license key.