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  • Title: Refractive index dependence of the coupling characteristics between long-range surface-plasmon-polariton and dielectric waveguide modes.
    Author: Liu F, Wan R, Huang Y, Peng J.
    Journal: Opt Lett; 2009 Sep 01; 34(17):2697-9. PubMed ID: 19724536.
    Abstract:
    The coupling characteristics of a hybrid coupler comprised of a long-range surface-plasmon-polariton (LRSPP) waveguide and a dielectric waveguide is analyzed with different detecting layers. Calculation results show that the coupling strength between the LRSPP mode and the dielectric-waveguide mode is rather sensitive to the refractive index of the detecting layer. This is promising to realize an integrated refractive index sensor with high resolution better than 4 x 10(-7) refractive index units or a modulator with rather low driving power and insert loss.
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