An integrated atom detector: single atoms and photon statistics
Dennis Heine, Marco Wilzbach, Thomas Raub, Bj\"orn Hessmo, and J\"org, Schmiedmayer
TL;DR
This paper presents a fiber-optics-based atom detector integrated on an atom chip that efficiently detects single atoms and analyzes photon statistics to study atomic flux and correlations.
Contribution
It introduces a fully integrated fiber-optic fluorescence detector capable of high-efficiency single-atom detection and photon correlation analysis.
Findings
66% detection efficiency for single atoms
Near-perfect photon antibunching observed
Studied second-order intensity correlations over wide atomic densities
Abstract
We demonstrate a robust fiber-optics-based fluorescence detector, fully integrated on an atom chip, which detects single atoms propagating in a guide with 66% efficiency. We characterize the detector performance and the atom flux by analyzing the photon statistics. Near-perfect photon antibunching proves that single atoms are detected, and allows us to study the second-order intensity correlation function of the fluorescence over three orders of magnitude in atomic density.
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