Table 4.

Waveguide sensitivity comparative analysis.

Waveguide structures	Bulk sensitivity Sb
TM photonic wire	0.37 (RIU/RIU) [37]
TE slot waveguide	0.83 (RIU/RIU) [37]
TE photonic wire	0.16 (RIU/RIU) [37]
TE photonic SOI strip waveguide (this work)	1.09 (RIU/RIU)
TE photonic Si3N4 strip waveguide (this work)	1.04 (RIU/RIU)