SAMOP 2023 – scientific programme
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Q: Fachverband Quantenoptik und Photonik
Q 67: Optomechanics III
Q 67.2: Talk
Friday, March 10, 2023, 11:15–11:30, F442
Direct laser-written optomechanical membranes in fiber Fabry-Perot cavities — •Lukas Tenbrake1, Alexander Faßbender2, Sebastian Hofferberth1, Stefan Linden2, and Hannes Pfeifer1 — 1Institute of Applied Physics, University of Bonn, Germany — 2Institute of Physics, University of Bonn, Germany
Cavity optomechanical experiments in micro- and nanophotonic systems have demonstrated record optomechanical coupling strenghts, but require elaborate techniques for interfacing. Their scaling towards larger systems including many mechanical and optical resonators is limited. Here, we demonstrate a directly fiber-coupled tunable and highly flexibile platform for cavity optomechanics based on 3D laser written polymer structures directly integrated into fiber Fabry-Perot cavities. Our experiments show vacuum coupling strengths of 30 kHz at mechanical mode frequencies of 3 MHz. This allows us to optomechanically tune the mechanical resonance frequency by tens of kHz exceeding the mechanical linewidth at cryogenic temperatures of ∼6 kHz at 4 K. The ease of interfacing the system through the direct fiber coupling, its scaling capabilities to larger systems with coupled resonators, and the possible integration of electrodes makes it a promising platform for upcoming challenges in cavity optomechanics. Fiber-tip integrated accelerometers, directly fiber coupled systems for µ-wave to optics conversion or large systems of coupled mechanical resonators are in reach.