Mainz 2017 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 11: Quantum Optics II
Q 11.6: Vortrag
Montag, 6. März 2017, 18:15–18:30, P 5
Spin-orbit coupling of photons emitted by a single ion — •Gabriel Araneda1, Daniel Higginbottom2, Jürgen Volz3, Arno Rauschenbeutel3, Yves Colombe1, and Rainer Blatt1,4 — 1Institut für Experimentalphysik, Universität Innsbruck, Technikerstr. 25, A-6020 Innsbruck, Austria — 2Australian National University, Canberra ACT 0200, Australia — 3Vienna Center for Quantum Science and Technology, TU Wien - Atominstitut, Stadionallee 2, 1020 Vienna, Austria — 4Institut für Quantenoptik und Quanteninformation, Österreichische Akademie der Wissenschaften, Technikerstraße 21a, A-6020 Innsbruck, Austria
The photon emission process in an atom conserves the total angular momentum of the atom-photon system. The angular momentum carried by the photon can be present as spin angular momentum, corresponding to the polarization of the light, and orbital angular momentum, which is related to the phase fronts of the radiated field. We present an experiment where the photons detected in a given direction carry solely orbital angular momentum. In this configuration, the apparent position of the emitter is shifted depending on the σ+ or σ− polarization of the emitted photons. The expected displacement is λ/π, where λ is the wavelength of the emitted photons. We detect σ+ and σ− photons in a direction perpendicular to the quantization axis, and observe a displacement of the apparent location of the ion that is compatible with the expected λ/π value.