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Focusing characteristics of a 4 pi parabolic mirror light-matter interface

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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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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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Bader,  Marianne
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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Mantel,  Klaus
Optical Technologies, Technology Development and Service Units, Max Planck Institute for the Science of Light, Max Planck Society;

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

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Citation

Alber, L., Fischer, M., Bader, M., Mantel, K., Sondermann, M., & Leuchs, G. (2017). Focusing characteristics of a 4 pi parabolic mirror light-matter interface. JOURNAL OF THE EUROPEAN OPTICAL SOCIETY-RAPID PUBLICATIONS, 13: 14. doi:10.1186/s41476-017-0043-y.


Cite as: https://hdl.handle.net/21.11116/0000-0000-8E47-1
Abstract
Background: Focusing with a 4 pi parabolic mirror allows for concentrating light from nearly the complete solid angle, whereas focusing with a single microscope objective limits the angle cone used for focusing to half solid angle at maximum. Increasing the solid angle by using deep parabolic mirrors comes at the cost of adding more complexity to the mirror's fabrication process and might introduce errors that reduce the focusing quality. Methods: To determine these errors, we experimentally examine the focusing properties of a 4p parabolic mirror that was produced by single-point diamond turning. The properties are characterized with a single Yb-174(+) ion as a mobile point scatterer. The ion is trapped in a vacuum environment with a movable high optical access Paul trap. Results: We demonstrate an effective focal spot size of 209 nm in lateral and 551 nm in axial direction. Such tight focusing allows us to build an efficient light-matter interface. Conclusion: Our findings agree with numerical simulations incorporating a finite ion temperature and interferometrically measured wavefront aberrations induced by the parabolic mirror. We point at further technological improvements and discuss the general scope of applications of a 4p parabolic mirror.