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9 March 2022 Cavity cooling by quadratic coupling in a levitated optomechanical system
Antonio Pontin, Peter F. Barker, Nathanael P. Bullier
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Proceedings Volume PC12016, Optical and Quantum Sensing and Precision Metrology II; PC120161K (2022) https://doi.org/10.1117/12.2610620
Event: SPIE OPTO, 2022, San Francisco, California, United States
Abstract
We report on cooling the center-of-mass motion of a nanoparticle via its interaction with a high finesse cavity. We exploit a hybrid trapping potential obtained by overlapping an electrodynamic potential and an optical standing wave. The coupling can be purely quadratic in displacement and gives rise to a Van der Pol nonlinear damping analogous to parametric feedback. The nanoparticle motion can be cooled by more than two orders of magnitude, and we experimentally demonstrate that the resulting energy distribution is strongly nonthermal. We will also present our initial results on 2D cooling of a tweezer-levitated nanoparticle exploiting coherent scattering.
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Antonio Pontin, Peter F. Barker, and Nathanael P. Bullier "Cavity cooling by quadratic coupling in a levitated optomechanical system", Proc. SPIE PC12016, Optical and Quantum Sensing and Precision Metrology II, PC120161K (9 March 2022); https://doi.org/10.1117/12.2610620
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KEYWORDS
Nanoparticles
Electrodynamics
Laser beam diagnostics
Nonlinear control
Scattering
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