Fig. 1. Schematic configuration of the proposed wavelength-selective photonic switch based on a GST-assisted MRR: (a) 3D view, (b) top view, (c) the cross section of the coupling region.

Fig. 2. (a) Calculated products of neff0R0 and neff1R1 for the fundamental TE mode as the GST-strip width varies. (b) Calculated transmission at the output end of the microring waveguide when the TE0 mode is launched from input end.

Fig. 3. (a) Calculated transmission of the local coupling region for the two states of the GST as a function of the coupling angle. The inset shows the schematic configuration of the simulation model. Optical field distribution of the local coupling region simulated by the 3D-FDTD method in the GST (b) crystalline and (c) amorphous state. Here WGST=168  nm and λ=1550  nm.

Fig. 4. Spectral responses of the designed microring switch simulated by the 3D-FDTD method in the GST (a) amorphous and (b) crystalline state. Optical power distribution of the designed microring switch at the resonance wavelength near 1563 nm in the GST (c) amorphous and (d) crystalline state.