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Q: Fachverband Quantenoptik und Photonik
Q 45: Quantum Effects (QED) II
Q 45.5: Talk
Thursday, March 12, 2020, 12:00–12:15, f442
Enhanced coherent atom-photon interaction in a hollow-core light cage — •Esteban Gómez-López1, Flavie Davidson-Marquis1, Bumjoon Jang2, Tim Kroh1, Chris Müller1, Mario Ziegler2, Julian Gargiulo3, Stefan A. Maier3, Harald Kübler4, Markus A. Schmidt2,5, and Oliver Benson1 — 1Humboldt-Universität zu Berlin — 2Leibniz Institute of Photonic Technology, Jena — 3Ludwig-Maximilians-Universität München — 4University of Stuttgart — 5Otto Schott Institute of Material Research, Jena
Quantum memories and repeaters are needed to overcome the unavoidable losses in the channels of quantum networks [1]. For this, atomic vapor cells provide a relatively easy to handle platform [2]. In this work we show for the first time coherent interaction between Cs atoms and light in a hollow-core light cage [3]. The tight confinement of the light in the cage placed inside a warm vapor cell leads to a significantly enhanced interaction strength compared to a freely propagating beam. Measurements of Electromagnetically Induced Transparency (EIT) transmission profiles show a clear deviation from the weak probe approximation predictions. We discuss these deviations and show generalized theoretical simulations, which provide a better fit to the measured spectra. The experiments set the base for delaying light pulses using EIT in a chip-integrated, easy-to-fill, device, and to the implementation of a compact quantum memory using the EIT-storage scheme. [1] Phys. Rev. Lett. 81, 5932 (1998). [2] Phys. Rev. Lett. 107, 053603 (2011). [3] ACS Photonics 6, 649 (2019).