title: Functional plasmonic nanocircuits with low insertion and propagation losses.
abstract: We experimentally demonstrate plasmonic nanocircuits operating as subdiffraction directional couplers optically excited with high efficiency from free-space using optical Yagi-Uda style antennas at λ0 = 1550 nm. The optical Yagi-Uda style antennas are designed to feed channel plasmon waveguides with high efficiency (45% in coupling, 60% total emission), narrow angular directivity (<40°), and low insertion loss. SPP channel waveguides exhibit propagation lengths as large as 34 μm with adiabatically tuned confinement and are integrated with ultracompact (5 × 10 μm(2)), highly dispersive directional couplers, which enable 30 dB discrimination over Δλ = 200 nm with only 0.3 dB device loss.
authors: Institute of Optics, Information and Photonics, Erlangen Graduate School in Advanced Optical Technologies, Friedrich-Alexander-University Erlangen-Nuremberg (FAU) and Max Planck Institute for the Science of Light , 91058 Erlangen, Germany.
authors: Arian
authors: A
authors: Kriesch
authors: Stanley P
authors: SP
authors: Burgos
authors: Daniel
authors: D
authors: Ploss
authors: Hannes
authors: H
authors: Pfeifer
authors: Harry A
authors: HA
authors: Atwater
authors: Ulf
authors: U
authors: Peschel
mesh_terms: D006046:Gold / Q000737:chemistry; D036103:Nanotechnology / Q000295:instrumentation*; D055095:Optics and Photonics; D012031:Refractometry; D020349:Surface Plasmon Resonance
chemical_list: D006046:Gold