Dresden 2020 – wissenschaftliches Programm

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SYES: Symposium Spain as Guest of Honor

SYES 2: Spain as Guest of Honor II

SYES 2.2: Hauptvortrag

Donnerstag, 19. März 2020, 15:30–16:00, HSZ 01

Towards phononic circuits based o optomechanics — •Clivia M. Sotomayor-Torres — Catalan Institute of Nanoscience and Nanotechnology (ICN2), CSIC and BIST,*Campus UAB, Bellaterra, 08193 Barcelona, Spain ICREA, Passeig Lluis Companys, 08010 Barcelona, Spain — ICREA, Passeig Lluis Companys, 08010 Barcelona, Spain

he optomechanical interaction using suspended nanobeams where overlapping confined mechanical and optical modes is chosen to realise 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 progress to integrate 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

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