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Updated: Jun 8, 2026

Microwave Photonics Systems Based on Whispering-gallery-mode Resonators
Published on: August 5, 2013
Real-space observation of spectral degeneracy breaking in a waveguide-coupled disk microresonator
Sylvain Blaize1, Felice Gesuele, Ilan Stefanon
1Laboratoire de Nanotechnologie et d’Instrumentation Optique, Institut Charles Delaunay, Université de Technologie de Troyes, 12 rue Marie-Curie BP2060 10010 Troyes, France. blaize@utt.fr
Abstract:
We report on the real-space observation of resonant frequency splitting in a high-Q waveguide-coupled silicon-on-insulator microdisk resonator. Phase sensitive near-field analysis reveals the stationary nature of the two resonant states, and spectral investigations clearly show their orthogonality. These measurements emphasize the role of the coupling waveguide in this splitting phenomenon. The symmetry of the two stationary whispering gallery modes is clearly observed and is found to follow the axial symmetry of the waveguide-coupled microdisk as it has been reported by earlier theoretical predictions.
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