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Journal Article

Precision spectroscopy by photon-recoil signal amplification

MPS-Authors

Lörch,  Niels
Laser Interferometry & Gravitational Wave Astronomy, AEI-Hannover, MPI for Gravitational Physics, Max Planck Society;

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Hammerer,  Klemens
Laser Interferometry & Gravitational Wave Astronomy, AEI-Hannover, MPI for Gravitational Physics, Max Planck Society;

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1309.7033.pdf
(Preprint), 634KB

ncomms4096.pdf
(Any fulltext), 569KB

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Citation

Wan, Y., Gebert, F., Wübbena, J. B., Scharnhorst, N., Amairi, S., Leroux, I. D., et al. (2014). Precision spectroscopy by photon-recoil signal amplification. Nature Communications, 5: 4096. doi:10.1038/ncomms4096.


Cite as: http://hdl.handle.net/11858/00-001M-0000-0027-A058-A
Abstract
Precision spectroscopy of atomic and molecular ions offers a window to new physics, but is typically limited to species with a cycling transition for laser cooling and detection. Quantum logic spectroscopy has overcome this limitation for species with long-lived excited states. Here, we extend quantum logic spectroscopy to fast, dipole-allowed transitions and apply it to perform an absolute frequency measurement. We detect the absorption of photons by the spectroscopically investigated ion through the photon recoil imparted on a co-trapped ion of a different species, on which we can perform efficient quantum logic detection techniques. This amplifies the recoil signal from a few absorbed photons to thousands of fluorescence photons. We resolve the line center of a dipole-allowed transition in 40Ca+ to 1/300 of its observed linewidth, rendering this measurement one of the most accurate of a broad transition. The simplicity and versatility of this approach enables spectroscopy of many previously inaccessible species.