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Vertical plasmonic MZI with D = 900 nm, T = 1500 nm, hHIL = 240 nm, w1 = 1550 nm, w2 = 1600 nm, Pgr = 1216.2 nm and hgr = 475 nm. (a) Figure of Merit (FOMλ) versus MZI length around λ = 4.6 µm. (b) Normalized output transmission versus wavelength at different medium refractive indices at L = 250 µm. (c) Resonance wavelength shift and output intensity fraction versus air medium refractive index change with MZI length of 250 µm around λ = 4.6 µm.
