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Q: Fachverband Quantenoptik und Photonik
Q 4: Hybrid Quantum Systems
Q 4.1: Talk
Monday, March 11, 2024, 11:00–11:15, HS 1199
Cavity optomechanics with polymer-based multi-membrane structures — •Lukas Tenbrake1, Sebastian Hofferberth1, Stefan Linden2, and Hannes Pfeifer3 — 1Institute of Applied Physics, University of Bonn, Germany — 2Institute of Physics, University of Bonn, Germany — 3Department of Microtechnology and Nanoscience, Chalmers University of Technology, Gothenburg, Sweden
Despite their application in multiple fields, ranging from quantum sensing to fundamental tests of quantum mechanics, conventional state-of-the-art cavity optomechanical experiments have been limited in their scaling towards systems with multiple resonators. 3D direct laser writing offers a new approach of fabricating multi-membrane structures that can be directly integrated into fiber Fabry-Perot cavities. Here, we experimentally demonstrate direct laser-written stacks of two or more coupled membranes – with normal-mode splittings of up to a MHz – interfaced by fiber cavities. We present finite element simulations for the optimization of the mechanical coupling and investigate the collective optomechanical coupling of multi-membrane stacks (with single-membrane vacuum optomechanial coupling strengths of 30 kHz). We present our first experimental results and give an outlook on the scalability of the system to an even larger number of coupled mechanical oscillators. Aside from tests of fundamental properties of multimode optomechanical systems, applications for sensing or routing of vibration in acoustic metamaterials and circuits are envisaged.