Heidelberg 2015 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 48: Optomechanics I
Q 48.4: Vortrag
Donnerstag, 26. März 2015, 11:45–12:00, P/H1
Topological Phases in Optomechanical Arrays — •Christian Brendel1, Vittorio Peano1, Michael Schmidt1, and Florian Marquardt1,2 — 1Institute for Theoretical Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg — 2Max Planck Institute for the Science of Light
Topological states of matter are particularly robust, since they exploit global features insensitive to local perturbations. In this talk, we describe how to create a Chern insulator of phonons in the solid state. The proposed implementation is based on a simple setting, a dielectric slab with a suitable pattern of holes. Its topological properties can be wholly tuned in-situ by adjusting the amplitude and frequency of a driving laser that controls the optomechanical interaction between light and sound. The resulting chiral, topologically protected phonon transport along the edges can be probed completely optically. Moreover, we identify a regime of strong mixing between photon and phonon excitations, which gives rise to a large set of different topological phases. This would be an example of a Chern insulator produced from the interaction between two physically very different particle species, photons and phonons.