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Q: Fachverband Quantenoptik und Photonik

Q 45: Quantum Effects (QED) II

Q 45.5: Vortrag

Donnerstag, 12. März 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. Schmidt^2,5, 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).