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Q: Fachverband Quantenoptik und Photonik
Q 44: Quantum Networks (joint session QI/Q)
Q 44.3: Vortrag
Mittwoch, 12. März 2025, 15:15–15:30, HS VIII
Hollow-core light cage waveguides for atomic vapor quantum memories — •Esteban Gómez-López1, Dominik Ritter1, Jisoo Kim2, Harald Kübler3, Markus Schmidt2,4, and Oliver Benson1 — 1Humboldt-Universität zu Berlin, 12489, Berlin, Germany — 2Leibniz Institute of Photonic Technology, 07745, Jena, Germany — 3Universität Stuttgart, 70550, Stuttgart, Germany — 4Otto Schott Institute of Material Research, 07743, Jena, Germany
Quantum memories play a fundamental role in synchronizing quantum network nodes. Using electromagnetically induced transparency (EIT) in hot atomic vapors provides easy-to-handle systems capable of storing light for up to seconds [1] and at the single photon level [2]. Recently we have shown that a novel photonic structure, a nanoprinted hollow-core light cage (LC), can enhance the effects of EIT when interfaced with Cs vapor, with the advantage of faster diffusion of atoms inside the core compared to other hollow-core structures [3]. In this work, we show the storage of faint coherent light pulses in the atomic medium confined within the core of the LC for hundreds of nanoseconds. The intrinsic efficiency of the memory was optimized by performing a parameter scan on the signal bandwidth and control power driving the memory. This paves the way towards an on-chip integrated module for quantum memories and as a platform for coherent interaction of light and warm atomic vapors. [1] Katz, O. and Firstenberg, O., Nat. Commun. 9, 2074 (2018). [2] Wolters, J., et al., Phys. Rev. Lett. 119(6), 060502 (2017). [3] Davidson-Marquis, F., et al., Light. Sci. Appl. 10, 114 (2021).
Keywords: hollow core waveguides; quantum memory; atomic vapor; electromagnetically induced transparency