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Abstract An overview is presented of the current state‐of‐the‐art in silicon nanophotonic ring resonators. Basic theory of ring resonators is discussed, and applied to the peculiarities of submicron silicon photonic wire waveguides: the small dimensions and tight bend radii, sensitivity to perturbations and the boundary conditions of the fabrication processes. Theory is compared to quantitative measurements. Finally, several of the more promising applications of silicon ring resonators are discussed: filters and optical delay lines, label‐free biosensors, and active rings for efficient modulators and even light sources.
Bogaerts et al. (Tue,) studied this question.
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