title: Plasmonic bandgap formation in two-dimensional periodic arrangements of gold patches with subwavelength gaps.
abstract: We report on the formation of plasmonic bandgaps in two-dimensional periodic arrangements of gold patches. Orthogonal arrays of subwavelength slits with different periodicities have been studied by means of a three-dimensional finite-difference time-domain (FDTD) code, changing incident polarization and geometrical parameters. Spectral response of gold patches having different a form factor and surrounded by different media have been also investigated and compared in order to give a full description of bandgap shifts paving the way for the design of polarization-sensitive devices.
authors.affiliation: Dipartimento di Elettrotecnica ed Elettronica (DEE), Politecnico di Bari, Bari, Italy.
authors.forename: Roberto
authors.initials: R
authors.lastname: Marani
authors.forename: Marco
authors.initials: M
authors.lastname: Grande
authors.forename: Valeria
authors.initials: V
authors.lastname: Marrocco
authors.forename: Antonella
authors.initials: A
authors.lastname: D'Orazio
authors.forename: Vincenzo
authors.initials: V
authors.lastname: Petruzzelli
authors.forename: Maria A
authors.initials: MA
authors.lastname: Vincenti
authors.forename: Domenico
authors.initials: D
authors.lastname: de Ceglia