title: Quantum dot-based local field imaging reveals plasmon-based interferometric logic in silver nanowire networks.
abstract: We show that the local electric field distribution of propagating plasmons along silver nanowires can be imaged by coating the nanowires with a layer of quantum dots, held off the surface of the nanowire by a nanoscale dielectric spacer layer. In simple networks of silver nanowires with two optical inputs, control of the optical polarization and phase of the input fields directs the guided waves to a specific nanowire output. The QD-luminescent images of these structures reveal that a complete family of phase-dependent, interferometric logic functions can be performed on these simple networks. These results show the potential for plasmonic waveguides to support compact interferometric logic operations.
authors.affiliation: Beijing National Laboratory for Condensed Matter Physics, Chinese Academy of Sciences, Beijing, China.
authors.forename: Hong
authors.initials: H
authors.lastname: Wei
authors.forename: Zhipeng
authors.initials: Z
authors.lastname: Li
authors.forename: Xiaorui
authors.initials: X
authors.lastname: Tian
authors.forename: Zhuoxian
authors.initials: Z
authors.lastname: Wang
authors.forename: Fengzi
authors.initials: F
authors.lastname: Cong
authors.forename: Ning
authors.initials: N
authors.lastname: Liu
authors.forename: Shunping
authors.initials: S
authors.lastname: Zhang
authors.forename: Peter
authors.initials: P
authors.lastname: Nordlander
authors.forename: Naomi J
authors.initials: NJ
authors.lastname: Halas
authors.forename: Hongxing
authors.initials: H
authors.lastname: Xu
mesh_terms: D004867:Equipment Design; D019544:Equipment Failure Analysis; D007368:Interferometry / Q000295:instrumentation*; D036103:Nanotechnology / Q000295:instrumentation*; D043942:Nanotubes / Q000737:chemistry* / Q000648:ultrastructure; D010316:Particle Size; D045663:Quantum Dots; D012815:Signal Processing, Computer-Assisted / Q000295:instrumentation*; D012834:Silver / Q000737:chemistry*; D020349:Surface Plasmon Resonance / Q000295:instrumentation*
chemical_list: D012834:Silver