Parametrical Optomechanical Oscillations in PhoXonic Whispering Gallery Mode Resonators

Abstract

We report on the experimental and theoretical analysis of parametrical optomechanical oscillations in hollow spherical phoxonic whispering gallery mode resonators due to radiation pressure. The optically excited acoustic eigenmodes of the phoxonic cavity oscillate regeneratively leading to parametric oscillation instabilities.

Out-of-plane emission of trions in monolayer WSe2 revealed by whispering gallery modes of dielectric microresonators

“…The spectral response of these resonances, called whispering gallery modes (WGMs), [60][61][62] mostly depends on the precise diameter of the microsphere (Supplementary Figure S2), which may be used to fine-tune the relative weight of desired energy regions of the PL spectrum with respect to others. However, we would like to focus here on a photonic application of these microspheres on nanomaterials (See Supplementary Figures S3 and S4), connected to the ability of WGMs of dielectric microspheres to provide for a tool to discriminate the OP component, from the IP one, of dipoles underneath (i.e., the luminescent dipoles of the 2D nanosheet), as illustrated in Figure 2c.…”

Microbubble PhoXonic resonators: Chaos transition and transfer

“…In addition, OMOs were also found in combination with nonlinear optical effects (NLOE): in particular, since OMOs activation threshold is typically lower, NLOEs typically start when the cavity is already oscillating. This coexistence, however, is not in general guaranteed: the two processes, in fact, compete on activation [20,19] and configurations where one is enhanced at the expense of the other are possible. Finally, it was shown [16] that launching high input powers into toroids and spheroids produces an erratic behaviour, which is experimentally observed through the formation of period doubling [17].…”

“…After the pioneering work in toroids [15,10,16], the optomechanical oscillations have been observed in other WGMRs, such as spheroids [17], solid microbottles [18] and MBRs [19]. In addition, OMOs were also found in combination with nonlinear optical effects (NLOE): in particular, since OMOs activation threshold is typically lower, NLOEs typically start when the cavity is already oscillating.…”

Microbubble Resonators for All-Optical Photoacoustics of Flowing Contrast Agents

“…Since MBRs are produced from a capillary, they can be filled easily through a microfluidic circuit and have been widely used as optical sensors due to their high sensitivity towards refractive index perturbations [23][24][25][26] and mechanical perturbations. The latter property, which comes from the high mechanical quality factor of the MBR structure [27][28][29][30], is promising for PA detection since it lowers the limit of detection through constructive mechanical interference.…”