Perfect blazing for transmission gratings.

Details Perfect blazing for transmission gratings. Perfect blazing for transmission gratings.

Sep 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990josaa...7.1736n&link_type=abstract

Journal of the Optical Society of America A, Vol. 7, No. 9, p. 1736 - 1739

Physics

4

Gratings

Scientific paper

Using electromagnetic theory, the authors first establish that a triangular-groove dielectric grating can be optimized to concentrate all the transmitted energy into only one transmitted order. This is done by evaporating an infinitely thin layer of a perfectly conducting metal on the small facet of the grooves. The m+1-order transmitted efficiency then approaches 96%, the difference from 100% being due to only the Fresnel normal reflection on the large facet. Second, a similar study is conducted with an antireflection coating added to the large facet. A diffraction efficiency of 100% is then theoretically obtained.

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