Up until now, ground state cooling using optomechanical interaction is realized in cavity-configurations and especially in the regime where optical dissipation is higher than mechanical dissipation. In our group, we consider cooling schemes in continuous optomechanical systems for example optical waveguides. In this particular work, we show that optomechanical ground state cooling in a continuous optomechanical system is possible by using backward Brillouin scattering. By tailoring the optomechanical coupling dynamically a significant cooling factor can be achieved, which can be several orders of magnitude lower than for the steady-state case.

Paper:
Changlong Zhu and Birgit Stiller, “Dynamic Brillouin cooling for continuous optomechanical systems” in Mater. Quantum Technol. 3 (2023) 015003.