Levitated cavity optomechanics at UCL exploiting coherent scattering

Antonio Pontin; Hayden Fu; Tania S. Monteiro; Peter F. Barker

doi:10.1117/12.2635444

3 October 2022 Levitated cavity optomechanics at UCL exploiting coherent scattering

Antonio Pontin, Hayden Fu, Tania S. Monteiro, Peter F. Barker

Proceedings Volume PC12198, Optical Trapping and Optical Micromanipulation XIX; PC121980Z (2022) https://doi.org/10.1117/12.2635444
Event: SPIE Nanoscience + Engineering, 2022, San Diego, California, United States

Abstract

We will report on recent progress in our levitated optomechanics experiment. We exploit a coherent scattering approach which has allowed a significant acceleration of the field in recent years. In this setting, a tweezer levitated nanoparticle interacts with the optical field of a Fabry-Perot cavity which is driven solely by light resonantly scattered by the particle itself. The interaction with the cavity field leads to a cross-coupling of the motional degrees of freedom (DoF) in the tweezer polarization plane so that the two DoFs are mixed. We will experimentally show that away from the cavity node, where most experiments have been working, there is a “sweet spot” where competing processes prevent the cavity from mixing these DoFs. While currently in the weak coupling regime, this effect could prevent the formation of bright/dark modes when the strong coupling is reached.

Conference Presentation

Citation Download Citation

Antonio Pontin, Hayden Fu, Tania S. Monteiro, and Peter F. Barker "Levitated cavity optomechanics at UCL exploiting coherent scattering", Proc. SPIE PC12198, Optical Trapping and Optical Micromanipulation XIX, PC121980Z (3 October 2022); https://doi.org/10.1117/12.2635444

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