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Q: Fachverband Quantenoptik und Photonik
Q 23: Optomechanics I & Optovibronics
Q 23.2: Vortrag
Mittwoch, 8. März 2023, 11:15–11:30, A320
Optoacoustic active phonon cooling in waveguides — •Laura Blázquez Martínez1, Philipp Wiedemann1, Andreas Geilen1, Changlong Zhu1, and Birgit Stiller1,2 — 1Max Planck Institute for the Science of Light, Staudtstrasse 2, 91058, Erlangen, Germany — 2Physics department office, FAU Erlangen-Nürnberg, Staudtstr. 7 / B2, 91058, Erlangen, Germany
Optomechanical cooling is usually observed in resonator-based setups. In waveguides, active cooling via optomechanical or optoacoustic interactions is still largely unexplored. Here, we demonstrate experimentally active optoacoustic phonon cooling using the nonlinear effect of Brillouin-Mandelstam scattering in a chalcogenide glass photonic crystal fibre (PCF). The regime of height saturation for the anti-Stokes peak is demonstrated experimentally. Based on the Brillouin resonance behaviour, we show cooling by a temperature difference of ΔT ≈ 190 K from room temperature at 7.53 GHz, exceeding 3 times previously reported values.