SAMOP 2023 – scientific programme
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Q: Fachverband Quantenoptik und Photonik
Q 48: Optomechanics II
Q 48.7: Talk
Thursday, March 9, 2023, 12:45–13:00, E214
Dissipative cavity optomechanics with a suspended frequency-dependent mirror — Sushanth Kini Manjeshwar1, Anastasiia Ciers1, •Juliette Monsel1, Cindy Peralle2, Shu Min Wang1, Philippe Tassin2, and Witlef Wieczorek1 — 1Department of Microtechnology and Nanoscience, Chalmers University of Technology, SE-412 96 Göteborg, Sweden — 2Department of Physics, Chalmers University of Technology, SE-412 96 Göteborg, Sweden
Cavity optomechanics with a strongly frequency-dependent mirror, such as a photonic crystal mirror, offers novel capabilities in manipulating mechanical motion, such as the implementation of efficient cooling. Here, we build an input-output-based description of such an optomechanical system, generalizing Ref. [1] by including in our model a dissipative optomechanical coupling arising from the change in the loss rate of the cavity due to the mechanical motion. We then analyze the optomechanical properties of the system, in particular the mechanical frequency shift and optomechanical cooling. Finally, we show how our model matches our experimental measurements of a chip-based microcavity. Our setup consists of a suspended photonic crystal mirror [2] and a distributed Bragg reflector mirror, forming a free-space, Fabry-Pérot-type optomechanical microcavity with a length less than the optical wavelength and approaching the ultra-strong coupling regime.
[1] O. Černotík, A. Dantan, C. Genes, Phys. Rev. Lett. 122, 243601 (2019)
[2] S. Kini Manjeshwar, et al., Appl. Phys. Lett. 116, 264001 (2020)