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. 2016 Dec 9;6:38562. doi: 10.1038/srep38562

Figure 4.

Figure 4

Simulative transmission spectra of TE (0°) and TM (90°) polarization modes for (a) PGG and (b) EPG; Simulative effective refractive indexes of TE and TM polarization modes for (c) PGG and (d) EPG.