Read about our new work on strong optoacoustic cooling of a 50cm-long acoustic wave by 219 K from room temperature:

Abstract:

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.

Authors:

Laura Blázquez Martínez, Philipp Wiedemann, Changlong Zhu, Andreas Geilen and Birgit Stiller