title: Perfect extinction in subwavelength dual metallic transmitting gratings.
abstract: We investigate the strong electromagnetic coupling that settles in dual metallic grating structures. This coupling is evidenced to lead to a perfect optical extinction in the transmission spectrum. The behavior of this perfect extinction that strongly depends on the longitudinal space and the lateral displacement between the two gratings can be explained by a simple model that describes the interference between a propagating mode and a couple of evanescent modes. The results show that the electromagnetic transmission of the structure can be tuned by controlling the position of this perfect transmission extinction and thus pave the way to new types of infrared tunable filters.
authors.affiliation: ONERA—The French Aerospace Lab, F-91761, Palaiseau, France.
authors.forename: Thomas
authors.initials: T
authors.lastname: Estruch
authors.forename: Julien
authors.initials: J
authors.lastname: Jaeck
authors.forename: Fabrice
authors.initials: F
authors.lastname: Pardo
authors.forename: Sophie
authors.initials: S
authors.lastname: Derelle
authors.forename: Jérôme
authors.initials: J
authors.lastname: Primot
authors.forename: Jean-Luc
authors.initials: JL
authors.lastname: Pelouard
authors.forename: Riad
authors.initials: R
authors.lastname: Haidar