title: Tunable, polarization independent, narrow-band filtering with one-dimensional crossed resonant gratings.
abstract: We propose an optical component for widely tunable, narrow-band filtering. It takes advantage of the tunability properties, with respect to the angle of incidence, of guided-mode resonance filters. The intrinsic polarization sensitivity of the resonances is suppressed by exciting the modes through two identical, differently oriented one-dimensional gratings flanking a thick substrate. An example is provided that theoretically shows a polarization independent peak at 1.6 μm with a Q factor of 13,000 and a reflectivity greater than 99% at resonance, which is tunable over 100 nm. Finally, we discuss the fabrication limitations and conclude that the proposed configuration is realistic.
authors.affiliation: Institut Fresnel, CNRS, Ecole Centrale Marseille, Aix-Marseille Université, 13013 Marseille, France. anne-laure.fehrembach@fresnel.fr
authors.forename: A-L
authors.initials: AL
authors.lastname: Fehrembach
authors.forename: K
authors.initials: K
authors.lastname: Chan Shin Yu
authors.forename: A
authors.initials: A
authors.lastname: Monmayrant
authors.forename: P
authors.initials: P
authors.lastname: Arguel
authors.forename: A
authors.initials: A
authors.lastname: Sentenac
authors.forename: O
authors.initials: O
authors.lastname: Gauthier-Lafaye