Figure 1

(A) Photo of the 28Si crystal sample. (B) Simulated field density for a WGM with of azimuthal mode number m = 4 and ω0/2π = 7.01 GHz.
(A) Photo of the 28Si crystal sample. (B) Simulated field density for a WGM with of azimuthal mode number m = 4 and ω0/2π = 7.01 GHz.