372048.fig.005a
(a)
372048.fig.005b
(b)
Figure 5: (a) Schematic of a switch consisting of a silver-air-silver MDM plasmonic waveguide side-coupled to a cavity filled with an absorbing material with refractive index 𝑛 = 2 . 0 2 + 𝑖 𝜅 . The imaginary part 𝜅 of the refractive index can be modified with an external control beam. (b) Transmission spectra of the switch calculated using FDFD. Results are shown for 𝑤 = 5 0  nm, 𝐿 = 1 2 0  nm, 𝜅 = 0 (black curve), 𝑤 = 5 0  nm, 𝐿 = 4 0 5  nm, 𝜅 = 0 (red curve), 𝑤 = 2 0 0  nm, 𝐿 = 1 7 5  nm, 𝜅 = 0 (green curve), and 𝑤 = 5 0  nm, 𝐿 = 1 2 0  nm, 𝜅 = 0 . 1 (blue curve). In all cases 𝑤 0 = 5 0  nm and 𝜆 0 = 1 . 5 5 μm.