Parametrical optomechanical oscillations in microbubble resonators: Suppression and enhancement of nonlinear phenomena.

Rosello-Mecho X., Farnesi D., Barucci A., Frigenti G., Ratto F., Delgado-Pinar M., Andrés M.V., Pelli S., Pini R., Nunzi Conti G., Soria S.

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We report on the observation of parametrical optomechanical oscillations, coexistence of optomechanical parametrical oscillations (OMPO) and nonlinear phenomena, suppression of the oscillations, and a detailed modeling of the mechanical oscillations, showing also a very dense mechanical mode spectra. The mechanical eigenmodes of the phoxonic cavity oscillate regeneratively leading to parametric oscillation instabilities. The observed phenomenology can be explained by the geometrical characteristics of a microbubble resonator.

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