Fig. 1. (a) Free-space and (b) integrated optics depiction of a silicon microsphere with radius a coupled to a single-mode OFHC placed at an impact parameter b, and the elastic scattering due to the WGMs, GS, and SI.

Fig. 2. Illustration of an elastic scattering spectrum from a microsphere indicating the WGMs, the MD, the BG, and the spectral mode spacing (Δλ).

Fig. 3. (a) Schematic of the experimental setup describing the elastic scattering from the silicon microsphere. (b) Picture of the silicon microsphere positioned on the silica OFHC.

Fig. 4. Elastic scattering intensity (a) unpolarized, (b) TE polarized, and (c) TM polarized spectra from a silicon microsphere.

Fig. 5. Single-mode spacing (Δλ) spectral coverage for (a) unpolarized, (b) TE polarized, and (c) TM polarized elastic scattering from a silicon microsphere.

Fig. 6. One-third of mode spacing (Δλ/3) in spectral coverage for (a) unpolarized, (b) TE polarized, and (c) TM polarized elastic scattering from a silicon microsphere.