Dynamical backaction in an ultrahigh-finesse fiber-based microcavity

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-Pérot 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, $\mathcal{F}=195000$. We are able to position-tune the static optomechanical coupling to a silicon nitride membrane stripe, reaching frequency pull parameters of up to $|G/2\pi |=1\mathrm{GHz}\mathrm{n}{\mathrm{m}}^{-1}$. We also demonstrate radiation pressure backaction in the regime of an ultrahigh finesse up to $\mathcal{F}=165000$.

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Cited by in corpus (13)

• Achievements and Perspectives of Optical Fiber Fabry-Perot Cavities
• Laser cooling a membrane-in-the-middle system close to the quantum ground state from room temperature
• Direct laser-written optomechanical membranes in fiber Fabry-Perot cavities
• Optical coherence properties of Kramers' rare-earth ions at the nanoscale for quantum applications
• A fiber Fabry-Perot cavity based spectroscopic gas sensor
• A tunable fiber Fabry-Perot cavity for hybrid optomechanics stabilized at 4 K
• Mode mixing and losses in misaligned microcavities
• Fabrication of Customized, Low-Loss Optical Resonators by Combination of FIB-Milling and CO${}_2$ Laser Ablation
• Profile control of fibre-based micro-mirrors using adaptive laser shooting with $\text{in situ}$ imaging
• Mechanical mode imaging of a high-Q hybrid hBN/Si${}_3$N${}_4$ resonator
• Radiation pressure backaction on a hexagonal boron nitride nanomechanical resonator
• Detection of a semitransparent object with no exchange of quanta
• High-yield fabrication of micromirror templates via feedback-controlled laser ablation