SKM 2021 – scientific programme

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SYES: Symposium Spain as Guest of Honor

SYES 1: Spain as Guest of Honor

SYES 1.2: Invited Talk

Wednesday, September 29, 2021, 13:40–14:10, Audimax 2

Towards Phononic Circuits based on Optomechanics — •Clivia M. Sotomayor Torres — Catalan Institute of Nanoscience and Nanotechnology ICN2, Campus UAB, 08193 Bellaterra, Spain

The optomechanical (OM) interaction using suspended nanobeams where overlapping confined mechanical and optical modes coexist is chosen to realise phononic circuit elements. Room temperature mechanical quality factors reached Q > 103. We demonstrated a coherent phonon emitter at 0.3 GHz via self-pulsing and up to 5 GHz via dynamical back-action. The nanobeam is coupled evanescently via a tapered fibre either directly to the OM cavity or to an integrated photonic waveguide. The non-linear interactions can be controlled to reach a chaotic regime and, with an external laser, the coherent phonon emission can be modulated. The physics of synchronisation, of nanobeams coupled to optical waveguides and the coupling to surface acoustic waves to excite and detect phononic signals have been studied and reproducible functionalities demonstrated. We report on the successful integration of circuit elements in a proof-of-concept phononics chip.

Work in collaboration with D. Navarro-Urrios, M. Colombano, G. Arregui, J. Maire, N. Capuj, A. Griol, A. Martinez, J. Ahopelto, T. Makkonen, A. Pitanti, S. Zanotto, B. Djafari-Rouhani, Y. Pennec, D. Mencarelli and L. Pierantoni , partners of the EU H2020 FET Open project PHENOMEN (713450) www.phenomen-project.eu and G. Madiot