Abstract
We report on nonlinear optical effects on phoxonic cavities based on hollow whispering gallery mode resonators pumped with a continuous wave laser. We observed stimulated scattering effects such as Brillouin and Raman, Kerr effects such as degenerated and non-degenerated four wave mixing, and dispersive wave generation. These effects happened concomitantly. Hollow resonators give rise to a very rich nonlinear scenario due to the coexistence of several family modes.
Highlights
Stimulated Brillouin Scattering (SBS) in devices that highly confine light has attracted much attention in the last years[1,2,3,4]
In refs 26 and 33, the microbubble resonators (MBR) used have very thick walls compared to ours (2–4 μm), and the SBS and four wave mixing (FWM) observed in ref. 26 are not either simultaneous or the SBS line does not act as a pump in SBS-uncoupled FWM processes
We report on degenerated four wave mixing (FWM) from the Brillouin laser, non-degenerated FWM, dispersive waves and SBS and stimulated Raman scattering (SRS) appearing simultaneously
Summary
Stimulated Brillouin Scattering (SBS) in devices that highly confine light has attracted much attention in the last years[1,2,3,4] Among these devices, whispering gallery mode resonators (WGMR) have shown to be an excellent enhancement platform to study light matter interactions such as stimulated nonlinear optical processes and frequency generation. The narrow bandwidth would require that the Brillouin frequency shift equals the free spectral range (FSR) of the WGMR, placing stringent conditions on WGMR geometries[14,15,16] Because of their eccentricity, in microbubble resonators this condition can be bypassed by using high order modes[17,18] with vertical FSR smaller than the fundamental FSR10,19,20. We performed the experiments at room temperature and atmospheric pressure
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