title: Plasmonic metamaterial wave retarders in reflection by orthogonally oriented detuned electrical dipoles.
abstract: We demonstrate that a pair of perpendicular electrical dipolar scatterers resonating at different frequencies can be used as a metamaterial unit cell to construct a nanometer-thin retarder in reflection, designing nanocross and nanobrick plasmonic configurations to function as reflecting quarter-wave plates at ~1520 and 770 nm, respectively. The design is corroborated experimentally with a monolayer of gold nanobricks, transforming linearly polarized incident radiation into circularly polarized radiation at ~780 nm.
authors.affiliation: Mads Clausen Institute (MCI), University of Southern Denmark, Alsion 2, DK-6400 Sønderborg, Denmark. pors@mci.sdu.dk
authors.forename: Anders
authors.initials: A
authors.lastname: Pors
authors.forename: Michael G
authors.initials: MG
authors.lastname: Nielsen
authors.forename: Giuseppe
authors.initials: G
authors.lastname: Della Valle
authors.forename: Morten
authors.initials: M
authors.lastname: Willatzen
authors.forename: Ole
authors.initials: O
authors.lastname: Albrektsen
authors.forename: Sergey I
authors.initials: SI
authors.lastname: Bozhevolnyi