Optoacoustic cooling of traveling hypersound waves

We experimentally demonstrate optoacoustic cooling via stimulated Brillouin-Mandelstam scattering in a 50 cm-long tapered photonic crystal fiber. For a 7.38 GHz acoustic mode, a cooling rate of 219 K from room temperature has been achieved. As anti-Stokes and Stokes Brillouin processes naturally bre...

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Bibliographic Details
Published in:arXiv.org 2023-05
Main Authors: Laura Blázquez Martínez, Wiedemann, Philipp, Zhu, Changlong, Geilen, Andreas, Stiller, Birgit
Format: Article
Language:English
Subjects:
Cooling rate
Crystal fibers
Photonic crystals
Room temperature
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Summary:We experimentally demonstrate optoacoustic cooling via stimulated Brillouin-Mandelstam scattering in a 50 cm-long tapered photonic crystal fiber. For a 7.38 GHz acoustic mode, a cooling rate of 219 K from room temperature has been achieved. As anti-Stokes and Stokes Brillouin processes naturally break the symmetry of phonon cooling and heating, resolved sideband schemes are not necessary. The experiments pave the way to explore the classical to quantum transition for macroscopic objects and could enable new quantum technologies in terms of storage and repeater schemes.
ISSN:2331-8422