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The Panopticon device: An integrated Paul-trap-hemispherical mirror system for quantum optics.

G Araneda1, G Cerchiari1, D B Higginbottom2

  • 1Institut für Experimentalphysik, Universität Innsbruck, Technikerstrasse 25, 6020 Innsbruck, Austria.

The Review of Scientific Instruments
|December 2, 2020
PubMed
Summary

We developed a new apparatus to trap single barium ions (Ba+) near a hemispherical mirror. This setup allows studying quantum electrodynamics effects and enhances light collection efficiency.

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Area of Science:

  • Atomic, Molecular, and Optical (AMO) Physics
  • Quantum Optics
  • Experimental Physics

Background:

  • Trapping single ions is crucial for quantum information processing and studying fundamental physics.
  • Previous experimental setups faced limitations in optical access and fluorescence collection efficiency.

Purpose of the Study:

  • To design and construct a novel experimental apparatus for trapping single Ba+ ions.
  • To enable the investigation of quantum electrodynamics (QED) effects, including spontaneous emission modification.
  • To achieve high efficiency in collecting emitted photons in a single optical mode.

Main Methods:

  • Utilized a monolithic, 3D-printed Paul trap with high optical access.
  • Integrated an optical-quality hemispherical mirror positioned at the ion's location.
  • Employed a diffraction-limited, in-vacuum lens (NA = 0.7) for fluorescence collection.
  • Housed the apparatus within a state-of-the-art ultra-high vacuum (UHV) system.

Main Results:

  • Successfully trapped single Ba+ ions at the center of curvature of the hemispherical mirror.
  • Achieved a photon collection efficiency of 31% in a single optical mode.
  • Demonstrated the capability to study strong inhibition and enhancement of spontaneous emission.

Conclusions:

  • The newly developed apparatus provides a robust platform for exploring QED phenomena with trapped ions.
  • The high collection efficiency facilitates sensitive measurements of light-matter interactions.
  • This work advances the experimental capabilities for precision measurements in atomic physics.