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Freiburg 2019 – wissenschaftliches Programm

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FM: Fall Meeting

FM 41: Poster: Quantum Sensing

FM 41.4: Poster

Dienstag, 24. September 2019, 16:30–18:30, Tents

High-reflectivity AlGaAs-based on-chip optomechanical devices for quantum optics experiments — •Sushanth Kini M1, Karim Elkhouly1, Jamie Fitzgerald2, Shu Min Wang3, Phillippe Tassin2, and Witlef Wieczorek11Quantum Technology Laboratory, Department of Microtechonolgy and Nanoscience, Chalmers University of Technology, Sweden — 2Department of Physics, Chalmers University of Technology, Sweden — 3Photonics Laboratory, Department of Microtechonolgy and Nanoscience, Chalmers University of Technology, Sweden

Cavity optomechanical devices exploit the interaction between light and mechanical motion for controlling mechanical resonators down to the quantum regime. A major challenge in the field remains accessing a strong interaction on the level of single quanta. The concept of multi-element optomechanics has been proposed to reach this regime. In the present work, we fabricate mechanical devices in an AlGaAs heterostructure with the goal to realise this concept. One of the requirements to achieve single photon strong coupling is to have highly reflective mechanical devices. Therefore, we pattern the mechanical devices with a photonic crystal that results in an out-of-plane reflectivity close to unity. We show results on simulation, fabrication and the optical and mechanical characterization of the optomechanical resonators. Our device concept should allow for a fully integrated realization of multi-element optomechanical system in the near future.

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