Optomechanics in hybrid fully-integrated two-dimensional photonic crystal resonators

Abstract : Optomechanical systems, in which the vibrations of a mechanical resonator are coupled to an electromagnetic radiation, have permitted the investigation of a wealth of novel physical effects. To fully exploit these phenomena in realistic circuits and to achieve different functionalities on a single chip, the integration of optomechanical resonators is mandatory. Here, we propose a novel approach to heterogeneously integrated arrays of two-dimensional photonic crystal defect cavities on top of silicon-on-insulator waveguides. The optomechanical response of these devices is investigated and evidences an optomechanical coupling involving both dispersive and dissipative mechanisms. By controlling optical coupling between the waveguide and the photonic crystal, we were able to vary and understand the relative strength of these couplings. This scalable platform allows for unprecedented control on the optomechanical coupling mechanisms, with a potential benefit in cooling experiments, and for the development of multi-element optomechanical circuits in the frame of optomechanically-driven signal-processing applications.
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Viktor Tsvirkun. Optomechanics in hybrid fully-integrated two-dimensional photonic crystal resonators. Condensed Matter [cond-mat]. Université Paris Sud - Paris XI, 2015. English. ⟨NNT : 2015PA112176⟩. ⟨tel-01223835⟩

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