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Q: Fachverband Quantenoptik und Photonik
Q 23: Optomechanics I & Optovibronics
Q 23.1: Vortrag
Mittwoch, 8. März 2023, 11:00–11:15, A320
Quantum optomechanics with a levitated nanoparticle and an on-chip photonic crystal cavity — •Seyed Khalil Alavi1,2, Jin Chang3, Danial Davoudi1, Marion Hagel4, Simon Gröblacher3, and Sungkun Hong1,2 — 1Institute for Functional Matter and Quantum Technologies, Universität Stuttgart, Stuttgart, DE — 2Center for Integrated Quantum Science and Technology, Universität Stuttgart, Stuttgart, DE — 3Kavli Institute of Nanoscience, Department of Quantum Nanoscience, Delft University of Technology, Delft, The Netherlands — 4Max Planck Institute for Solid State Research, Stuttgart, DE
A levitated dielectric nanoparticle coupled to an optical cavity is a promising platform for quantum optomechanics. Recent progress includes cooling the particle's motion to the ground state achieved with a conventional optical cavity. A photonic crystal nanocavity (PCN) is an attractive alternative offering enhanced optomechanical coupling. The optomechanical coupling up to 10 kHz has been previously demonstrated with a stand-alone PCN. However, the system's fragility to optical absorption and mechanical perturbation prevented further advancement toward the quantum regime. In this talk, we present a new platform based on an on-chip PCN that can achieve the goal. The new PCN architecture ensures significantly improved mechanical and thermo-optic stability, allowing experiments at a high vacuum and with a large number of intracavity photons. We discuss our recent progress toward obtaining the quantum cooperativity above one.