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Fundamental WGM Sensing Mechanisms
Fundamental sensing mechanisms (A–F) and corresponding applications (G–I) of the WGM sensor, including mode shift (A and D), mode splitting (B and E), and mode broadening (C and F). (G) Thermal shift sensing using a silk microtoroid resonator.23 (H) Mode splitting induced by individual polystyrene (PS) nanoparticles.24 (I) Mode broadening spectra induced by single nanoparticles.25
