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Box shaped waveguide cross-sections and fundamental mode profiles. (a) Illustration of box shaped Si3N4 waveguide embedded in SiO2 on the Si-carrier. (b) Scanning electron microscope image of waveguide cross-section. (c) Simulated TE00 intensity mode profile at 1250 nm for a waveguide 1 μm wide and 1 μm high. (d) Simulated TM00 intensity mode profile at 1250 nm for a waveguide 1 μm wide and 1 μm high.
