Raman Imaging of Atoms Inside a High-bandwidth Cavity
- URL: http://arxiv.org/abs/2202.05369v2
- Date: Thu, 17 Feb 2022 18:15:41 GMT
- Title: Raman Imaging of Atoms Inside a High-bandwidth Cavity
- Authors: Eduardo Uru\~nuela, Maximilian Ammenwerth, Pooja Malik, Lukas Ahlheit,
Hannes Pfeifer, Wolfgang Alt, and Dieter Meschede
- Abstract summary: High-bandwidth, fiber-based optical cavities are a promising building block for future quantum networks.
In high-bandwidth cavities, standard fluorescence imaging on the atom-cavity resonance line for controlling atom positions is impaired.
We restore imaging of $87$Rb atoms strongly coupled to such a fiber Fabry-P'erot cavity by detecting the repumper fluorescence.
- Score: 0.0
- License: http://creativecommons.org/licenses/by/4.0/
- Abstract: High-bandwidth, fiber-based optical cavities are a promising building block
for future quantum networks. They are used to resonantly couple stationary
qubits such as single or multiple atoms with photons routing quantum
information into a fiber network at high rates. In high-bandwidth cavities,
standard fluorescence imaging on the atom-cavity resonance line for controlling
atom positions is impaired since the Purcell effect strongly suppresses
all-directional fluorescence. Here, we restore imaging of $^{87}$Rb atoms
strongly coupled to such a fiber Fabry-P\'erot cavity by detecting the repumper
fluorescence which is generated by continuous and three-dimensional Raman
sideband cooling. We have carried out a detailed spectroscopic investigation of
the repumper-induced differential light shifts affecting the Raman resonance,
dependent on intensity and detuning. Our analysis identifies a compromise
regime between imaging signal-to-noise ratio and survival rate, where physical
insight into the role of dipole-force fluctuations in the heating dynamics of
trapped atoms is gained.
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