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oai:recercat.cat:2072/4358262024-10-31T03:06:16Zcom_2072_98col_2072_378192

Nonlinear dynamics and chaos in an optomechanical beam Navarro Urrios, Daniel Capuj, Nestor Eduardo Colombano Sosa, Martin García Fernández, Pedro David Sledzinska, Marianna Alzina, Francesc Griol, Amadeu Martínez, Alejandro Sotomayor Torres, Clivia M. Nonlinear phenomena Optomechanics Photonic crystals Altres ajuts: Beatriu de Pinos postdoctoral fellowship (BP-DGR 2015) Optical nonlinearities, such as thermo-optic mechanisms and free-carrier dispersion, are often considered unwelcome effects in silicon-based resonators and, more specifically, optomechanical cavities, since they affect, for instance, the relative detuning between an optical resonance and the excitation laser. Here, we exploit these nonlinearities and their intercoupling with the mechanical degrees of freedom of a silicon optomechanical nanobeam to unveil a rich set of fundamentally different complex dynamics. By smoothly changing the parameters of the excitation laser we demonstrate accurate control to activate two- A nd four-dimensional limit cycles, a period-doubling route and a six-dimensional chaos. In addition, by scanning the laser parameters in opposite senses we demonstrate bistability and hysteresis between two- A nd four-dimensional limit cycles, between different coherent mechanical states and between four-dimensional limit cycles and chaos. Our findings open new routes towards exploiting silicon-based optomechanical photonic crystals as a versatile building block to be used in neurocomputational networks and for chaos-based applications. 2017 Article European Commission 713450 Ministerio de Economía y Competitividad FIS2015-70862-P Ministerio de Economía y Competitividad RYC-2014-15392 Nature communications ; Vol. 8 (April 2017), art. 14965 open access Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, la comunicació pública de l'obra i la creació d'obres derivades, fins i tot amb finalitats comercials, sempre i quan es reconegui l'autoria de l'obra original. https://creativecommons.org/licenses/by/4.0/