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Authors: S. Werquin, P. Bienstman
Title: Interferometric approach to solve microring resonance splitting in biosensor applications
Format: International Conference Proceedings
Publication date: 11/2012
Journal/Conference/Book: Proceedings of the 2012 Annual Symposium of the IEEE Photonics Society Benelux
Volume(Issue): p.187-190
Location: Mons, Belgium
Citations: Look up on Google Scholar
Download: Download this Publication (453KB) (453KB)


Silicon-on-insulator microring resonators have proven to be an excellent platform for label-free nanophotonic biosensors. The high index contrast of the silicon-an-insulator platform allows for fabrication of micrometer size sensors. However, it also limits the quality of the resonances by introducing an intrinsic mode-splitting. Small deviations from peifect symmetry lift the degeneracy of the normal resonator modes. This severely
deteriorates the quality of the output signal. The quality of the resonances is of utmost
importance to determine the performance of the micro rings as a biosensor. We suggest an integrated interferometric approach to give access to the unsplit, high-quality normal modes of the microring resonator.

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