000164837 001__ 164837 000164837 005__ 20181203022336.0 000164837 022__ $$a1094-4087 000164837 02470 $$2ISI$$a000241517400049 000164837 037__ $$aARTICLE 000164837 245__ $$aOptical interactions in a plasmonic particle coupled to a metallic film 000164837 269__ $$a2006 000164837 260__ $$bOptical Society of America$$c2006 000164837 336__ $$aJournal Articles 000164837 520__ $$aThe interplay between localized surface plasmon (LSP) and surface plasmon-polariton (SPP) is studied in detail in a system composed of a three-dimensional gold particle located at a short distance from a gold thin film. Important frequency shifts of the LSP associated with the particle are observed for spacing distances between 0 and 50 nm. Beyond this distance the LSP and SPP resonances overlap, although some cavity effects between the particle and the film can still be observed. In particular, when the spacing increases the field in the cavity decreases more slowly than one would expect from a simple image dipole interpretation. For short separations the coupling between the particle and the film can produce a dramatic enhancement of the electromagnetic field in the space between them, where the electric field intensity can reach 5000 times that of the illumination field. Several movies show the spectral and time evolutions of the field distribution in the system both in and out of resonance. The character of the different modes excited in the system is studied. They include dipolar and quadrupolar modes, the latter exhibiting essentially a magnetic response. (c) 2006 Optical Society of America 000164837 6531_ $$aEnhanced Raman-Scattering 000164837 6531_ $$aBand-Gap Structures 000164837 6531_ $$aSurface 000164837 6531_ $$aResonance 000164837 6531_ $$aBends 000164837 6531_ $$aLight 000164837 700__ $$0245375$$aLévêque, Gaëtan$$g167620 000164837 700__ $$0244723$$aMartin, Olivier J. F.$$g159310 000164837 773__ $$j14$$q9971-9981$$tOptics Express 000164837 8564_ $$s4332595$$uhttps://infoscience.epfl.ch/record/164837/files/081.pdf$$yn/a$$zn/a 000164837 909C0 $$0252353$$pNAM$$xU10373 000164837 909CO $$ooai:infoscience.tind.io:164837$$pSTI$$particle 000164837 917Z8 $$x178738 000164837 937__ $$aEPFL-ARTICLE-164837 000164837 973__ $$aEPFL$$rREVIEWED$$sPUBLISHED 000164837 980__ $$aARTICLE