We have proposed and analyzed high sensitivity and high Q-factor triangular ring resonator (TRR) with a total internal
reflection (TIR) mirror in silicon-on-insulator (SOI) -based slot waveguide. Different from the conventional integrated
optical devices such as waveguide, bend, splitter, and filter, in which the light is guided in high-index medium by the
total internal reflection, the slot waveguide confines the E-field in the low-index region by way of strong discontinuities
at the interface between the low-index core and the high-index claddings. Because the waveguide using these
characteristic has a lower effective index than high-index waveguide, the TRR have been achieved high sensitivity, in
which the long evanescent fields on a TIR mirror. Optical quality factor of up to 9.461x102 is calculated in such filters,
and the sensitivity of the resonance shift for changing the refractive index of 1x10-4 at the incidence angle of 34.11° has been identified as high as 1.02x105 nm/RIU.
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