Low-contrast top gratings in high-contrast SOI waveguides for integrated holographic filters

New developments in magneto-optic interferometric switching

“…However, in order to build a silicon waveguide, a low-index cladding material must be positioned between the waveguide and the substrate in order to prevent the optical mode from leaking out. In the silicon-on-insulator (SOI) platform, a buried oxide insulator on a silicon substrate functions in this capacity (Figure 8.1) [59] - [60].…”