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. 2014 Sep 29;4:6491. doi: 10.1038/srep06491

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(a1) – (a3) The simulated NR spectra for (a1) TM light and (a2) TE light and (a3) the extinction ratio of NR_TM/NR_TE, (b1–b3) The simulated reflection spectra for (b1) TM light and (b2) TE light and (b3) the extinction ratio of R_TE/R_TM. The colors in (a1–a2) and (b1–b2) are the fraction of incident power going into NR or R in percentage. The cyan dashed lines in (a1) and (a2) represent the boundary between the diffraction zone and the non-diffraction zone. The red dotted line in (b1) represents the SPR wavelengths. The inset in (b3) shows the high extinction ratio zone in detail. The structure used in this simulation is the same as that of the fabricated device shown in Fig. 1.