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Updated: Jun 5, 2026

Photoelectron Imaging of Anions Illustrated by 310 Nm Detachment of F−
Published on: July 27, 2018
Highly efficient state-selective submicrosecond photoionization detection of single atoms.
1Fakultät für Physik, Ludwig-Maximilians-Universität München, D-80799 München, Germany. florian.henkel@physik.uni-muenchen.de
We developed a fast, highly efficient method to detect single atoms using photoionization and coincidence counting. This technique achieves over 98% detection efficiency for quantum applications and atomic spectroscopy.
Area of Science:
- Atomic Physics
- Quantum Optics
- Spectroscopy
Background:
- State analysis of single atoms is crucial for quantum information and precision measurements.
- Existing methods often lack the speed or efficiency required for real-time analysis.
Purpose of the Study:
- To demonstrate a novel, high-efficiency, and rapid detection scheme for single optically trapped atoms.
- To enable precise state analysis for quantum applications and ultracold atom spectroscopy.
Main Methods:
- Utilized hyperfine-state-selective photoionization of single atoms.
- Employed coincidence counting of correlated photoion-electron pairs using channel electron multipliers.
- Developed a scheme for calibrating absolute detection efficiencies.
Main Results:
- Achieved a detection time of less than 1 microsecond.
- Demonstrated an overall detection efficiency exceeding 98%.
- Successfully registered correlated photoion-electron pairs.
Conclusions:
- The developed scheme offers a significant advancement in single-atom detection.
- The high efficiency and speed make it suitable for quantum information processing.
- This method can be a key component for future precision spectroscopy of ultracold atoms.
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