title: Three-dimensional focusing of broadband microwave beams by a layered photonic structure.
abstract: Experiment and analysis confirm that a finite layered structure involving glass layers with broad strip metallizations can be characterized by broadband negative refractionlike behavior in three dimensions. The structure is further characterized as capable of 2:1 broadband focusing of near field radiation, with verified experimental focusing bandwidth of 1:5:1. This represents a significant improvement over the two-dimensional and narrow band focusing operation of current implementations of left-handed media. An electronic reconfigurable version is identified together with potential applications.
authors.affiliation: SFA/NRL, Largo, Maryland 20774, USA.
authors.forename: C
authors.initials: C
authors.lastname: Monzon
authors.forename: P
authors.initials: P
authors.lastname: Loschialpo
authors.forename: D
authors.initials: D
authors.lastname: Smith
authors.forename: F
authors.initials: F
authors.lastname: Rachford
authors.forename: P
authors.initials: P
authors.lastname: Moore
authors.forename: D W
authors.initials: DW
authors.lastname: Forester