1. Dynamical Backaction in an Ultrahigh-Finesse Fiber-Based Microcavity
- Author
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Alexandre Brieussel, Irene Sánchez Arribas, Felix Rochau, Sebastian Stapfner, David Hunger, and Eva M. Weig
- Subjects
Scattering cross-section ,Field (physics) ,Astrophysics::High Energy Astrophysical Phenomena ,FOS: Physical sciences ,Physics::Optics ,General Physics and Astronomy ,02 engineering and technology ,01 natural sciences ,law.invention ,Finesse ,law ,0103 physical sciences ,ddc:530 ,Fiber ,010306 general physics ,optomechanics, silicon nitride ,Optomechanics ,Condensed Matter::Quantum Gases ,Physics ,Condensed Matter::Other ,Quantum Physics ,021001 nanoscience & nanotechnology ,Coupling (probability) ,ddc ,Radiation pressure ,Optical cavity ,Atomic physics ,0210 nano-technology ,Physics - Optics ,Optics (physics.optics) - Abstract
The use of low-dimensional objects in the field of cavity optomechanics is limited by their low scattering cross section compared to the size of the optical cavity mode. Fiber-based Fabry-P\'{e}rot 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, $\mathcal{F} = 195\,000$. We are able to position-tune the static optomechanical coupling to a silicon nitride membrane stripe, reaching frequency pull parameters of up to $\mathrm{\lvert G/2\pi\rvert=1}\,\mathrm{GHz\, nm^{-1}}$. We also demonstrate radiation pressure backaction in the regime of an ultrahigh finesse up to $\mathcal{F}=165\,000$.
- Published
- 2021