6533b828fe1ef96bd1288fbf
RESEARCH PRODUCT
Momentum-space spectroscopy for advanced analysis of dielectric-loaded surface plasmon polariton coupled and bent waveguides
J.-c. WeeberAlexandre BouhelierKarim HassanR. Espiau De LamaestreT. BernardinGérard Colas-des-francsAlain Dereuxsubject
Physicsbusiness.industryPhysics::OpticsFOS: Physical sciencesPosition and momentum space02 engineering and technologyDielectric021001 nanoscience & nanotechnologyCondensed Matter PhysicsCurvature01 natural sciencesSurface plasmon polaritonElectronic Optical and Magnetic Materials010309 opticsMomentumOptics0103 physical sciencesQuasiparticle0210 nano-technologybusinessSpectroscopyPlasmonPhysics - OpticsOptics (physics.optics)description
We perform advanced radiation leakage microscopy of routing dielectric-loaded plasmonic waveguiding structures. By direct plane imaging and momentum-space spectroscopy, we analyze the energy transfer between coupled waveguides as a function of gap distance and reveal the momentum distribution of curved geometries. Specifically, we observed a clear degeneracy lift of the effective indices for strongly interacting waveguides in agreement with coupled-mode theory. We use momentum-space representations to discuss the effect of curvature on dielectric-loaded waveguides. The experimental images are successfully reproduced by a numerical and an analytical model of the mode propagating in a curved plasmonic waveguide.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2013-05-03 |