Schematic nanostrip plasmon waveguide and reference coordinate system. The width of the nanostrip and the thickness of the active layer are denoted by w and d, respectively.
(a) Dispersion relation of nanostrip plasmon waveguide with strip width ranging from 20 to 200 nm. (b) Propagation length (1/Im[k]) of nanostrip plasmon waveguide.
(a) Original PF spectra, (b) Q, (c) H(ωk ) with strip width = 20–200 nm, respectively.
(a) Power dissipation rate corresponding to different frequency and normalized in-plan wavevector. Inset: Power dissipation spectrum for ω = 3.0 eV, wavevector intervals represent radiation, SPP, and lossy surface wave, respectively. (b) Total dissipation rate, coupling into radiation, SPP, and lossy mode are denoted by solid, dashed, dotted, and dashed-dotted lines, respectively. Ratio of SPP mode is represented by blue line.
Modified PF spectra for strip width ranging from 20 to 200 nm.
Evolution of maximum value of PF spectra with different emission linewidth, evaluated with (a) simplified model and (b) modified model. (c) Critical emission linewidth with different plasmonic linewidth, calculated by both models.
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