8 March 2014 Bloch mode spatial harmonic decomposition in integrated localized surface plasmon chain
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We consider a gold nanoparticle chain integrated on a dielectric waveguide. With appropriate geometrical parameters, such a chain behaves as a waveguide. We show that the spatial harmonics generated in the sub-wavelength periodic structure can be locally separated or extracted. This is done by playing with the phase matching condition of the coupling with the dielectric waveguide: only the fundamental component is locally cancelled in the periodic structure, resulting in a non-monotone phase evolution along the structure. Additionnally we show that the analysis of spatial harmonics allows extracting more information on the localized surface plasmon mode generation.
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M. Février, M. Février, P. Gogol, P. Gogol, V. Yam, V. Yam, R. Megy, R. Megy, B. Dagens, B. Dagens, "Bloch mode spatial harmonic decomposition in integrated localized surface plasmon chain", Proc. SPIE 8988, Integrated Optics: Devices, Materials, and Technologies XVIII, 89880T (8 March 2014); doi: 10.1117/12.2037720; https://doi.org/10.1117/12.2037720


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