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SEM micrographs of silica microresonators on a chip showing the evolution of the cavity shape.
SEM micrographs of silica microsphere on a chip with a radius of 5.4 μm (a) and 11.5 μm (b).
(Color online) The doublet resonance structure for a microtoroid with a radius of 33 μm (a) and for a microsphere with a radius of 13.5 μm (b) in undercoupling regime. In each graph, the solid line (red) is a dual-Lorentz fit.
(Color online) Measured Q-factor of microspheres versus sphere radius (green circles). Theoretical radiative losses Q rad TE (solid blue line) and Q rad TM (dashed red line). Theoretical water adsorption Q water (orange squares).
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