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Opt Lett. 1998 Aug 1;23(15):1149-51.

Increasing the angular tolerance of resonant grating filters with doubly periodic structures.

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  • 1Laboratoire d'Optique des Surfaces et des Couches Minces, Unité Propre de Recherche de l'Enseignment Supérieur-A 6080, Centre National de Recherche Scientifique, Ecole Nationale Supérieure de Physique de Marseille, 13397 Marseille Cedex 20, France.


One can increase the angular tolerance of resonant grating filters without modifying the spectral bandwidth by adding a second grating component parallel to the first one. The angular tolerance and the filter linewidth can be controlled by the designer in an independent way. Numerical results show that this property permits the use of waveguide-grating filters with standard collimated beams.

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