Regensburg 2025 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
TT: Fachverband Tiefe Temperaturen
TT 30: Nanomechanical systems (joint session HL/TT)
TT 30.1: Vortrag
Mittwoch, 19. März 2025, 15:00–15:15, H17
Optimizing an Integrated Photonic Racetrack Resonator for Optomechanical Synchronization — •Agnes Zinth1 and Menno Poot1,2,3 — 1Department of Physics, TUM School of Natural Sciences, Technical University of Munich, Garching, Germany — 2Munich Center for Quantum Science and Technology (MCQST), Munich, Germany — 3Institute for Advanced Study, Technical University of Munich, Garching, Germany
In the field of optomechanics, synchronization will be an essential tool in fields like sensing and quantum technologies. Towards this goal, we develop a photonic integrated optomechanical device consisting of a silicon nitride racetrack cavity with partly suspended waveguide that can vibrate freely. A second beam is added to improve the optomechanical coupling. The observed mechanical modes do not match in frequency, so we use a predisplaced beam instead [1]. The remaining frequency distance can be tuned by the laser power. As the light propagates in the predisplaced beam and only past the PhC beam, it shifts further than the photonic crystal one due to thermal effects. To synchronize them with optomechanical backaction, we also need to enhance the optical cavity. Therefore, we modify the transition from supported to suspended parts. Two different approaches lead to the desired improved optical quality. Currently, we are investigating their impact on the mechanics. We believe that, in the next generation of devices, we can synchronize the racetrack and photonic crystal beam.
[1] Geometric tuning of stress in predisplaced silicon nitride resonators. Nano Letters, 22(10), 4013-4019.
Keywords: Optomechanics; Micromechanical Systems; Integrated