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Scheme of the SEMS structure. The parameters for the SEMS structure is depicted in the text.
(a) Loss coefficient of the LRSPPs in the SEMS structure. (b) The decay rate of LSW using the model of surface dipole provided by Ford and Weber. (c) The calculated TEPOD into LRSPPs. Solid line represents the dipole with perpendicular momentum to the surface of the thin gold film; dot line represents the averaged dipole.
Total decay rate of erbium ions with perpendicular momentum. Solid line represents decay rate with the thin gold film; dash line represents decay rate without the thin gold film. The detailed results are plotted in the inset.
(a) Coupling efficiency between the LRSPPs and the photons when the incident angle of light is in the range of . (b) The electric field within the Si and SiEr layers at 0° with an energy of .
Net gain of the SEMS structure.
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