Sweep of Aeff versus SiC width at \(\lambda\) = 775 nm (part a) and \(\lambda\) = 1550nm (part b) for SiC heights of 100 nm, 150 nm, 200 nm, and 250 nm. c and d show mode pictures for wSiC = 250 nm and hSiC = 250 nm (part c) and wSiC = 150 nm and hSiC = 250 nm (part d) for the SH mode (top) and the FH mode (bottom). Despite the reduced mode areas of the design of c, the design of d has a higher normalized conversion efficiency due to the locations of the modes.