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Shifting the phase of a coherent beam with a Yb-174(+) ion: influence of the scattering cross section

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Fischer,  Martin
4pi Photon Atom Coupling, Leuchs Division, Max Planck Institute for the Science of Light, Max Planck Society;
University of Erlangen Nuremberg, Dept Phys;

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Srivathsan,  Bharath
4pi Photon Atom Coupling, Leuchs Division, Max Planck Institute for the Science of Light, Max Planck Society;

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Alber,  Lucas
4pi Photon Atom Coupling, Leuchs Division, Max Planck Institute for the Science of Light, Max Planck Society;
University of Erlangen Nuremberg, Dept Phys;

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Sondermann,  Markus
4pi Photon Atom Coupling, Leuchs Division, Max Planck Institute for the Science of Light, Max Planck Society;
University of Erlangen Nuremberg, Dept Phys;

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Leuchs,  Gerd
University of Erlangen Nuremberg, Dept Phys;
Leuchs Division, Max Planck Institute for the Science of Light, Max Planck Society;
University of Ottawa, Dept Phys;

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Citation

Fischer, M., Srivathsan, B., Alber, L., Weber, M., Sondermann, M., & Leuchs, G. (2017). Shifting the phase of a coherent beam with a Yb-174(+) ion: influence of the scattering cross section. APPLIED PHYSICS B-LASERS AND OPTICS, 123(1): 48. doi:10.1007/s00340-016-6609-3.


Cite as: https://hdl.handle.net/21.11116/0000-0000-8E53-3
Abstract
We discuss and measure the phase shift imposed onto a radially polarized light beam when focusing it onto an Yb-174(+) ion. In the derivation of the expected phase shifts, we include the properties of the involved atomic levels. Furthermore, we emphasize the importance of the scattering cross section and its relation to the efficiency for coupling the focused light to an atom. The phase shifts found in the experiment are compatible with the expected ones when accounting for known deficiencies of the focusing optics and the motion of the trapped ion at the Doppler limit of laser cooling (Hensch and Schawlow in Opt Commun 13:68-69,1975).