Berlin 2018 – wissenschaftliches Programm

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KFM: Fachverband Kristalline Festkörper und deren Mikrostruktur

KFM 1: Whispering Gallery Mode Resonators I

KFM 1.1: Hauptvortrag

Montag, 12. März 2018, 09:30–10:00, EMH 025

Collective nano-optomechanics and liquids — •Ivan Favero — Université Paris Diderot, CNRS, France

We present a new technique to resonantly tune ensembles of nanophotonic/mechanical resonators. The technique builds on the recent experimental development of nano-optomechanics in the liquid-state [1]. Laser light injected into the optical mode of a first resonator immersed in a liquid triggers an etching process, leading to a fine-tuning of the resonators dimensions. The evolution of dimensions is monitored continuously by spectrally tracking the associated optical resonance. This tuning process, dubbed resonant photo-electrochemical etching, is naturally scalable to multiple resonators and has already allowed us to resonantly tune small ensembles (2 to 5 units) [2]. As a first application of this technique, we explore the resonant optical interaction of multiple and distant nano-optomechanical systems. Light flowing unidirectionally along a chain of nano-optomechanical oscillators is observed to produce their frequency-locking above a certain threshold, which represents a first example of collective phenomenon in optomechanics [3]. Our experiments are explained by a minimal semi-classical model, and set the grounds for more advanced quantum experiments.

Acknowledgements: the work presented involved contribution by E. Gil-Santos, W. Hease, A. Lemaitre, M. Labousse, C. Ciuti and G. Leo

[1] Nature Nanotech 10, 810 (2015) [2] Nature Comm 8, 14267 (2017). [3] Phys Rev Lett 118, 063605 (2017).