  We report on the design and fabrication of a new type of microtoroid high-Q
silica resonators monolithically coupled to on-chip silicon nanowire
waveguides. In order to enable monolithic waveguide coupling, the microtoroid
geometry is inverted such that the resonator is formed by thermal reflow at the
circumference of a hole etched in a suspended SiO2 membrane. This configuration
is shown to be conducive to integration with a fully functional Silicon
Photonics technology platform.
