6533b81ffe1ef96bd12786bb
RESEARCH PRODUCT
Determinant role of the edges in defining surface plasmon propagation in stripe waveguides and tapered concentrators
Alexandre BouhelierMaria AllegriniFrancesco TantussiGérard Colas Des FrancsJohann BerthelotPadmnabh RaiJean-claude WeeberAlain DereuxFrancesco Fusosubject
DiffractionTotal internal reflectionMaterials sciencebusiness.industrySurface plasmonNanophotonicsPhysics::OpticsStatistical and Nonlinear Physics02 engineering and technology021001 nanoscience & nanotechnology01 natural sciencesSurface plasmon polaritonAtomic and Molecular Physics and Opticslaw.inventionOpticslaw0103 physical sciencesNear-field scanning optical microscope[ SPI.NANO ] Engineering Sciences [physics]/Micro and nanotechnologies/Microelectronics[SPI.NANO]Engineering Sciences [physics]/Micro and nanotechnologies/Microelectronics010306 general physics0210 nano-technologybusinessWaveguideLocalized surface plasmondescription
International audience; In this paper, we experimentally show the effect of waveguide discontinuity on the propagation of the surface plasmon in metal stripes and tapered terminations. Dual-plane leakage microscopy and near-field microscopy were performed on Au stripes with varied widths to imag29e the surface plasmon intensity distribution in real and reciprocal spaces. We unambiguously demonstrate that edge diffraction is the limiting process determining the cutoff conditions of the surface plasmon mode. Finally, we determine the optimal tapered geometry leading to the highest transmission.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2012-02-01 |