6533b857fe1ef96bd12b4f56
RESEARCH PRODUCT
Discontinuity induced angular distribution of photon plasmon coupling
Aude L. LereuBenoit CluzelT. CharvolinF. De FornelAli PassianL. SalomonDamien BrissingerColette Dumassubject
[PHYS.PHYS.PHYS-OPTICS]Physics [physics]/Physics [physics]/Optics [physics.optics]Materials sciencePhotonbusiness.industrySurface plasmonPhysics::Optics02 engineering and technology021001 nanoscience & nanotechnology01 natural sciencesSurface plasmon polaritonAtomic and Molecular Physics and OpticsOptics0103 physical sciencesNear-field scanning optical microscopeSurface plasmon resonance010306 general physics0210 nano-technologybusinessPlasmonExcitationLocalized surface plasmondescription
Metal-dielectric transitions are important structures that can display a host of optical characteristics including excitation of plasmons. Metal-dielectric discontinuities can furthermore support plasmon excitation without a severe condition on the incident angle of the exciting photons. Using a semi-infinite thin gold film, we study surface plasmon (SP) excitation and the associated electromagnetic near-field distribution by recording the resulting plasmon interference patterns. In particular, we measure interference periods involving SPs at the scanable metal/air interface and the buried metal/glass one. Supported by optical near-field simulations and experiments, we demonstrate that the metal/glass surface plasmon is observable over a wide range of incident angles encompassing values above and below the critical incident angle. As a result, it is shown that scanning near-field microscopy can provide quantitative evaluation of the real part of the buried surface plasmon wavevector.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2011-01-01 |