title: Spiral plasmonic nanoantennas as circular polarization transmission filters.
abstract: We present simulation and experimental results for easily fabricated spiral plasmonic antenna analogues providing circular polarization selectivity. One circular polarization state is concentrated and transmitted through a subwavelength aperture, while the opposite circular state is blocked. The spectral bandwidth, efficiency, and extinction ratios are tunable through geometric parameters. Integration of such structures onto a focal plane array in conjunction with linear micropolarizers enables complete Stokes vector imaging, that, until now, has been difficult to achieve. An array of these structures forms a plasmonic metamaterial that exhibits high circular dichroism.
authors.affiliation: Department of Physics, Colorado School of Mines, Golden, CO 80401, USA.
authors.forename: K A
authors.initials: KA
authors.lastname: Bachman
authors.forename: J J
authors.initials: JJ
authors.lastname: Peltzer
authors.forename: P D
authors.initials: PD
authors.lastname: Flammer
authors.forename: T E
authors.initials: TE
authors.lastname: Furtak
authors.forename: R T
authors.initials: RT
authors.lastname: Collins
authors.forename: R E
authors.initials: RE
authors.lastname: Hollingsworth
mesh_terms: D002942:Circular Dichroism / Q000295:instrumentation* / Q000379:methods; D003198:Computer Simulation; D006046:Gold / Q000737:chemistry; D008420:Manufactured Materials; D036103:Nanotechnology / Q000295:instrumentation* / Q000379:methods; D055095:Optics and Photonics / Q000295:instrumentation*; D012822:Silicon Dioxide / Q000737:chemistry; D020349:Surface Plasmon Resonance / Q000295:instrumentation* / Q000379:methods
chemical_list: D006046:Gold; D012822:Silicon Dioxide