Fig. 12From: Subwavelength silicon photonics for on-chip mode-manipulationa A sharp MWB with mode converters based on a metamaterial-assisted PMMA upper-cladding [233]; b A 90°-MWB based on shallowly-etched non-uniform SWGs [237]; c A sharp MWB based on a pixelated meta-structure [238]; d A sharp MWB for six dual-polarization modes realized by combining the designs with modified Euler-curve and shallowly-etched non-uniform SWGs [239]Back to article page