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Bichromatic synchronized chaos in coupled optomechanical nanoresonators | Guilhem Madiot
; Franck Correia
; Sylvain Barbay
; Rémy Braive
; | Date: |
18 May 2020 | Abstract: | Synchronization and chaos are two well known and ubiquitous phenomena in
nature. Interestingly, under specific conditions, coupled chaotic systems can
display synchronization in some of their observables. Here, we experimentally
investigate bichromatic synchronization on the route to chaos of two
non-identical mechanically coupled optomechanical nanocavities.
Electromechanical near-resonant excitation of one of the resonators evidences
hysteretic behaviors of the coupled mechanical modes which can, under amplitude
modulation, reach the chaotic regime. The observations, allowing to measure
directly the full phase space of the system, are accurately modeled by coupled
periodically forced Duffing resonators thanks to a complete calibration of the
experimental parameters. This shows that, besides chaos transfer from the
mechanical to the optical frequency domain, spatial chaos transfer between the
two nonidentical subsystems occurs. Upon simultaneous excitations of the
coupled membranes modes, we also demonstrate bichromatic chaos synchronization
between quadratures at the two distinct carrier frequencies of the normal
modes. Their respective quadrature amplitudes are consistently synchronized
thanks to the modal orthogonality breaking induced by the nonlinearity.
Meanwhile, their phases show complex dynamics with imperfect synchronization
in the chaotic regime. Our generic model agrees again quantitatively with the
observed synchronization dynamics. These results set the ground for the
experimental study of yet unexplored collective dynamics of e.g synchronization
in arrays of strongly coupled, nanoscale nonlinear oscillators for applications
ranging from precise measurements to multispectral chaotic encryption and
random bit generation, and to analog computing, to mention a few. | Source: | arXiv, 2005.8896 | Services: | Forum | Review | PDF | Favorites |
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