Dynamical backaction in an ultrahigh-finesse fiber-based microcavity

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ROCHAU, Felix, Irene SÁNCHEZ ARRIBAS, Alexandre BRIEUSSEL, Sebastian STAPFNER, David HUNGER, Eva M. WEIG, 2021. Dynamical backaction in an ultrahigh-finesse fiber-based microcavity. In: Physical Review Applied. American Physical Society (APS). 16(1), 014013. eISSN 2331-7019. Available under: doi: 10.1103/PhysRevApplied.16.014013

@article{Rochau2021-07-19T09:19:58ZDynam-54569, title={Dynamical backaction in an ultrahigh-finesse fiber-based microcavity}, year={2021}, doi={10.1103/PhysRevApplied.16.014013}, number={1}, volume={16}, journal={Physical Review Applied}, author={Rochau, Felix and Sánchez Arribas, Irene and Brieussel, Alexandre and Stapfner, Sebastian and Hunger, David and Weig, Eva M.}, note={Article Number: 014013} }

Weig, Eva M. Brieussel, Alexandre 2021-08-12T08:24:33Z Dynamical backaction in an ultrahigh-finesse fiber-based microcavity Rochau, Felix Hunger, David Attribution 4.0 International 2021-08-12T08:24:33Z Brieussel, Alexandre 2021-07-19T09:19:58Z Rochau, Felix Hunger, David Sánchez Arribas, Irene Sánchez Arribas, Irene Weig, Eva M. eng Stapfner, Sebastian Stapfner, Sebastian The use of low-dimensional objects in the field of cavity optomechanics is limited by their low scattering cross section compared with the size of the optical cavity mode. Fiber-based Fabry-Perot microcavities can feature tiny mode cross sections and still maintain a high finesse, boosting the light-matter interaction and thus enabling the sensitive detection of the displacement of minute objects. Here we present such an ultrasensitive microcavity setup with the highest finesse reported so far in loaded fiber cavities, F=195000. We are able to position-tune the static optomechanical coupling to a silicon nitride membrane stripe, reaching frequency pull parameters of up to ∣∣G/2π∣=1GHznm<sup>−1</sup>. We also demonstrate radiation pressure backaction in the regime of an ultrahigh finesse up to F=165000.

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