title: Generation of hyper-parametric oscillations in silica microbubbles.
abstract: Cavity resonant enhanced stimulated Raman scattering (SRS), four-wave mixing, and broadband hyper-parametric oscillation in silica microbubble whispering gallery mode resonators (WGMR) in forward and backward directions are reported in this Letter. We show that microbubbles can operate not only in a highly ideal two-photon emission regime, but also generate combs, both natively and multi-mode spaced. The nonlinear process is phase matched because of the interaction of different mode families of the resonator.
authors.forename: Daniele
authors.initials: D
authors.lastname: Farnesi
authors.forename: Andrea
authors.initials: A
authors.lastname: Barucci
authors.forename: Giancarlo C
authors.initials: GC
authors.lastname: Righini
authors.forename: Gualtiero Nunzi
authors.initials: GN
authors.lastname: Conti
authors.forename: Silvia
authors.initials: S
authors.lastname: Soria